[hansvm]

One property cash has is that you can transfer it freely -- Visa can't decide they don't like your business and shut you down overnight if all your customers are paying in cash. Cryptocurrencies afford a similar guarantee for long-distance payments, without the fraud potential in, e.g., wire transfers.

Classical solutions running out of a database almost certainly could work better, but historically the middlemen involved have been unwilling to relinquish that level of control and just serve as dumb infrastructure.

[webspaceadam]

You can use other service providers where you can send money as you want, don't you? paysafe and other stuff that is used primarly on adult content sites :D

You are right regarding visa and other middleman of course. But it is not a problem most people have, isn't it?