Yes. Buyers can purchase cryptocurrency like Ether (Ethereum) or Bitcoin online with an EFT (electronic funds transfer) that may be an ACH from a bank account or an approved bank debit card or credit card transaction. Cryptocurrency sellers may receive proceeds with a funds transfer via an EFT transaction.  Service providers handling the crypto purchase and sale transactions may charge service fees and set and apply currency exchange rates between the cryptocurrency and the payment in a currency like the U.S. dollar to determine the total EFT amount.   Rather than buying cryptocurrency through individual transactions, investors may use an ETF  (exchange traded fund) for investing. Buying or selling shares in an ETF may be accomplished using an EFT (electronic funds transfer).