Which cryptocurrencies are most commonly accepted by payment processors?

Bitcoin and Ethereum are the most widely accepted cryptocurrencies by payment processors. Bitcoin, created in 2009, is the original and most recognized cryptocurrency, accepted by major processors like PayPal and Square. Ethereum, launched in 2015, is the second-largest by market value and increasingly accepted due to its smart contract functionality. Stablecoins like USDC and USDT are also gaining adoption because their prices stay fixed at $1, reducing volatility concerns for merchants. Some processors accept Litecoin and Bitcoin Cash for their faster transaction speeds. Adoption varies by region and processor—while cryptocurrencies remain a niche payment method compared to traditional options, their merchant acceptance continues growing as the technology matures and regulatory clarity improves.