I think everyday trust toward to the money is rapidly depleted, and people will finally realised how ignorant and gullible theyre to just earn the IOU garbage fake money, do you think crypto will trigger the complete bank run? Or any other delusional store of value that we dont know yet?
If everyone loses faith on fiat money, and causes a bank run, no one will be willing to sell their bitcoin for fiat money anymore, right? Why would they? Since you said "trust towards money is rapidly depleting", it means the fiat currency will end up being worthless. No one will exchange those worthless currency anymore. You see, this does not make any sense. Fiat won't be completely replaced by us, at least for now. Though it might in the future but in a planned way.
Fiat and can not be replaced by cryptocurrency. It also does not make sense for the development of the economy from the point of view of each state. The state will lose just its statehood if it switches to using cryptocurrency as the main currency of the state. Therefore, this can never be. This is possible only if only one super-state remains on planet Earth. While such a case in the history of mankind we do not know. Therefore, the cryptocurrency will always go at Fiat, and not vice versa.