Both things can be true: cash is a scam and so is crypto. The reason I despise crypto is because they just reinvented capitalism, when the old one was working just fine (in the sense that capitalism is not a broken system: it is functioning just as designed, benefiting the ruling class). So now we’ve got two ways they’re scamming us.
Money is not capitalism. You can have money without capitalism, as the whole world did for most of recorded history.