It is difficult to predict when the government's fiat money will collapse and Bitcoin will replace it, when the government that controls Bitcoin can go the other way otherwise Bitcoin will still be rejected by the government. The future is something that people don't know about and change but everyone wants bitcoin to be the future of fiat replacement.
There's no other way around government could accept the fact that cryptocurrency have the potential to make their system lose trust from the people. They will surely make a way to stop it for the sake of prevention and to be able still have the control of the people's taxes.
Regarding the topic "get poor slow scheme", I bet the op means the opposite about the get rich quick scheme but there's no proof about getting poor using fiats. Our financial status depends on our financial literacy, if we are spending way too many and our funds are getting insufficient, it is somehow our selves to be blame with this. We can be rich no matter if we utilize fiats or crypto.