Card payments solve a different issue (for starters the transaction is not irreversible), and no they don't cost that much in properly regulated markets. If I

Card payments solve a different issue (for starters the transaction is not irreversible), and no they don't cost that much in properly regulated markets. If I want to send money from Europe to the US, many traditional banks and fintechs are cheaper than cryptocurrency exchanges, and if that's still too expensive, for large amounts forex brokers will be under 0.1%. The fact stablecoins exist and have become so prevalent is really telling. People speculating with cryptocurrencies want to onboard and offboard USD... So now we have these coins, some are even replicating fractional banking, only illegally.