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Comparison of Payment Methods (and Cryptocurrencies)

This is comparison of various payment methods. In my opinion the most important aspects are: (1) privacy, (2) fungibility and resilience to censorship and expropriation, (3) day-to-day convenience and acceptance.

Comparison of Payment Methods

Source: eylenburg.github.io

Last updated: 5 December 2024

Fiat money Cryptocurrencies
Physical cash Bank transfer Bank-issued card (debit/credit) PayPal Central Bank Digital Currency (CBDC) Bitcoin (BTC) Bitcoin Cash (BCH) Litecoin (LTC) Monero (XMR)

Utility
Scalability / number of transactions Theoretically unlimited number of transactions as payments are decentralized (peer-to-peer). Theoretically unlimited number of transactions as payments are decentralized (bank-to-bank). Technical limits are unknown. Reportedly, VISA processes ~24,000 TPStransactions per second and Mastercard ~5,000 TPStransactions per second on average. Technical limits are unknown. Reportedly, PayPal processes 192 TPStransactions per second on average. TBC No, the blockchain can process only 7 TPStransactions per second and is chronically congested.
The "Layer 2" Lightning Network allows "millions to billions" of TPStransactions per second.
Theoretically unlimited TPStransactions per second due to variable blocksize (since May 2024). No, the blockchain can process only 56 TPStransactions per second, although this is currently sufficient. MWEB (Mimble­Wimble Extension Blocks) improve scalability by aggregating multiple transactions.
The "Layer 2" Lightning Network allows "millions to billions" of TPStransactions per second.
Theoretically unlimited TPStransactions per second due to variable blocksize.
Payment speed Instant Depends on the bank or country, can be instant or take several days. Instant Instant TBC 10 minutes for one block confirmation.
Instant with the "Layer 2" Lightning Network.
10 minutes for one block confirmation.
Instant with 0-conf which is relatively safe for BCH due to double spend proofs.
2.5 minutes for one block confirmation.
Instant with the "Layer 2" Lightning Network.
20 minutes to fully confirm payment and be able to spend received money (10 block confirmations, 2 minutes per block).
Transaction fees
(assuming no currency conversion)
None. Depends on the bank or country. Usually no fees, with some exceptions (e.g. for large transfers or certain international payments). Depends on the card issuer and country. Various fees, both variable and fixed, are charged and add up to on average around 2-3% of the transaction value. The fees are paid by the merchant/recipient. Various fees are charged, usually paid by the merchant/recipient. A typical fee for a domestic online purchase would be 2.9% + $0.30. Payments to "friends and family" are free. TBC Depends on the desired transfer speed and the network congestion. Transactions are "competing" to be included in the next block - the higher the fee paid the quicker the transactions will be confirmed (and if the chosen fee is too low, the transaction may fail altogether). Due to the chronic network congestion and small blocksize, transactions tend to cost more than for other cryptocurrencies. During the crypto boom of 2017, average fees reached $60 per transaction. Fees are independent of the transaction value, hence network fees seem low for large transactions and high for small transactions. From 03/2017 to 03/2024 the average fee was about $3.50source but of course this is highly dependent on the BTC/USD exchange rate.
Cheap transactions using the Lightning Network are also possible. But will still incur fees for opening/closing the channel and the Lightning node
Very low fees. Normally, a transaction costs a few USD cents. Very low fees at current network usage. Normally, a transaction costs a few USD cents.
Cheap transactions using the Lightning Network are also possible. But will still incur fees for opening/closing the channel and the Lightning node
Very low fees. Normally, a transaction costs a few USD cents.

Decentralization
Can transactions or accounts be blocked? Not possible Yes (by bank) Yes (by bank or card issuer) Yes (by PayPal) Yes (by government/central bank)CBDCs could empower the state to make it impossible to donate to a certain NGO or could prohibit certain people from purchasing certain items such as a flight ticket or alcohol. Not possible if using a non-custodial wallet. Not possible if using a non-custodial wallet. Not possible if using a non-custodial wallet. Not possible if using a non-custodial wallet.
Can funds be frozen or confiscated? Yes, if physically confiscated. Yes (by bank, police or government) Yes (by bank, police or government) Yes (by PayPal, police or government) Yes (by central bank, police or government)A CBDC can simply become an extension of the surveillance state and it could see citizens fined in a split second for behaviours deemed undesirable. Dissidents and activists could see their wallets emptied or taken offline. Not possible if using a non-custodial wallet. Not possible if using a non-custodial wallet. Not possible if using a non-custodial wallet. Not possible if using a non-custodial wallet.
Fungibility Fungibility means that it is not possible to identify a specific unit of money and therefore it is not possible for units of money to become "tainted" or accounts/wallets to be blacklisted by the authorities. Generally yes, but it is possible to identify specific banknotes by their serial number. No No No No. Each unit of money is uniquely identifiable and all transactions are centrally recorded. No. Due to the public blockchain, coins can become "tainted" and wallets can be blacklisted.
Source of funds can be obscured by mixing (CoinJoin), with various downsides.such as minimum funds needed, the time and fees for mixing, and the likely blacklisting of mixed coins from CEX and off-ramping providers
No. Due to the public blockchain, coins can become "tainted" and wallets can be blacklisted.
Source of funds can be obscured by mixing (CashFusion), with various downsides.such as minimum funds needed, the time and fees for mixing, and the likely blacklisting of mixed coins from CEX and off-ramping providers
No. Due to the public blockchain, coins can become "tainted" and wallets can be blacklisted. Coins used in MWEB transactions are fungible.By obfuscating the sending and receiving addresses as well as the transaction amounts, the individual units of Litecoin used in MWEB are indistinguishable from one another and therefore can't be identified and potentially blacklisted. Yes

Privacy
Anonymous accounts/wallets (no accounts) No, KYC required by law No, KYC required by law.
Except for certain prepaid cards paid with cash or crypto.Not available in all countries; limited acceptance with merchants.
No, PayPal requires customer identification. No (TBC) Yes, but most CEXCentralized Exchanges require KYC. Yes, but most CEXCentralized Exchanges require KYC. Yes, but most CEXCentralized Exchanges require KYC. Yes, but most CEXCentralized Exchanges require KYC.
Transaction privacy Private by default. Even sender and receiver can remain anonymous from each other. The involved banks and the government (on request) can view transactions. Sender and recipient know each other. The involved banks, the card issuer, and the government (on request) can view transactions. Sender and recipient know each other. PayPal and the government (on request) can view transactions. Sender and recipient know each other. The government has direct visibility of financial transactions and the spending of everyone. Sender and recipient know each other. Everyone can view transactions on the blockchain.
Using the Lightning Network slightly improves privacy.
Everyone can view transactions on the blockchain. Everyone can view transactions on the blockchain, except for MWEB transactionsMWEB (Mimblewimble Extension Blocks) hides amounts and addresses. The downside is that coins might get blacklisted by CEX and off-ramping providers.
Using the Lightning Network slightly improves privacy.
Private by default. Even sender and receiver can remain anonymous from each other. View keys exist for opt-in transparency.
Wealth privacy Only the owner knows his/her total wealth. The bank and the government (on request) can see the funds on the account. The bank and the government (on request) can see the funds on the account. PayPal and the government (on request) can see the funds on the account. The government can see the funds on the account. Everyone can see the funds of a wallet on the blockchain. Everyone can see the funds of a wallet on the blockchain. Everyone can see the funds of a wallet on the blockchain, except those relating to MWEB transactions. Transactions that are done on MWEB remains private indefinitely and the corresponding wallet balances are therefore hidden. However, when moving funds from MWEB to the normal blockchain an aggregated transaction is created, thereby making the total funds publicly visible again. Only the owner knows his/her total wealth.

Acceptance
Useable for in-person payments (e.g. shop)? Yes No Yes No TBC Yes, but negligible point-of-sale adoption. Yes, but negligible point-of-sale adoption. Yes, but negligible point-of-sale adoption. Yes, but negligible point-of-sale adoption.
Useable for online payments? No (except for cash in mail) Yes Yes Yes TBC Yes Yes Yes Yes
Useable for transfers between individuals? Yes Yes No Yes TBC Yes Yes Yes Yes

Other considerations
Automatic recurring payments? No Yes (direct debit, standing order) Yes Yes TBC No (unless supported by wallet app) No (unless supported by wallet app) No (unless supported by wallet app) No (unless supported by wallet app)
Chargebacks to protect buyers from fraud? No, not possible with physical money No, transactions are final Yes, under certain circumstances Yes, under certain circumstances TBC No, transactions are final No, transactions are final No, transactions are final No, transactions are final
Useable without electricity or Internet? Yes No No No No No No No No
"Store of Value" narrative No, fiat money has an unlimited supply as the central bank can create new money, thereby devaluing existing money. No. It is inflationary like all fiat money and additionally can be programmed to expire after a certain time.The government could theoretically give out money that expires within a certain period of time or money that could only be used on certain items, which could be used to induce behaviour that the government is seeking. For example, in the Chinese CBDC pilot program, money has an expiration date of a few weeks because authorities are hoping to drive consumption. Yes, deflationary. Fixed maximum supply which is further reduced by lost wallet seeds. Yes, deflationary. Fixed maximum supply which is further reduced by lost wallet seeds. Yes, deflationary. Fixed maximum supply which is further reduced by lost wallet seeds. Probably yes. There is a perpetual coin issuance (tail emissions) with inflation asymptotically approaching zero. Supply is further reduced by lost wallet seeds.

So, what's the conclusion?

How to get Monero?

There are numerous centralized exchanges (CEX) as well as P2P marketplaces where you can buy and sell Monero. Some of them require identifying yourself (KYC) to comply with anti-money laundering regulations. However, due to Monero's privacy features, the only thing known to the seller is that you bought Monero, but not how much you own or where you spend it. Some reputable places to buy Monero include: