That is very unlikely, believe me I would love to see a future like that, governments are not going to let that happen, they are too comfortable with fiat currencies since they can steal from everyone holding it, what it may happen is that lots of people will begin to use cryptocurrencies and then governments decide they cannot tolerate that any longer and ban them and begin to prosecute holders of crypto as if they were drug dealers but some countries will not do that and most crypto holders will move out there.