Bitcoin and Bitcoin Cash are secure currencies (cryptocurrency) for the internet. You can pay without handing out sensitive financial information, and you don't need an account.
Making a Bitcoin Cash or Bitcoin Core paymentMaking a Bitcoin Cash or Bitcoin Core payment is fast, convenient, and extremely secure. You won't need to enter any sensitive card information. Instead, you'll simply send the payment from your wallet app; we use Bitcoin Wallet and GreenAddress, for instance.
Paying a Bitcoin invoice from your wallet can be done through a Bitcoin address or a the QR Code.