I know for sure a time will come when money will no longer be in paper form but in digital form.
It's much easier to monitor digital transactions than paper money transactions... that's where 666 controlling spending comes in.
Libra will be easier to monitor AND censor, if they are lucky to launch. But not decentralized, censorship-resistant cryptocurrencies such as Bitcoin. A threat of a UASF/UAHF has already taken precedence, it will happen again if any group will try to co-opt Bitcoin.