noun
inconvertible paper money made legal tender by a government decree.
You can't create a new fiat currency system unless you gave banks and governments a real incentive to adopt this system. Bitcoin is already an alternative currency system and I'm not sure there's anything you can do in terms of fiat.
well if you look at how bitcoin is changing. you will see the establishment of LN HUBS... AKA banks.
so under the concept of LN where "banks" are one part of each counterparty LN contract(multisig). you start to develop idea's of how a new paradigm can be created.
ofcourse it becomes less importing for the old 'banks' to remain in management. and new 'managers' take change.
for instance in bitcoin i can see coinbase/bitpay becoming the big LN hubs. aswell as a few main merchants that decide to directly accept bitcoin.
so for a concept of this topic for new fiat fiat, we could see hospitals, schools, becoming the 'banks' of the future