> The main use case in El Salvador is having instant payments

What's the average time for a bitcoin transaction these days?

Ten minutes, ok.

So those people in El Salvador actually aren't transacting in BitCoin, they're doing transactions by having a number change in a centralized database somewhere that someone owns, and then claims that all transactions are backed by bitcoin, whatever that means.

And the difference between that, and having your bank update their centralized database as a result of a transaction going through the VISA network is... what, exactly?