What different is with Fiat money? it also is faith-based if there was a point that people started to fear the weakness of any Fiat in according to scale, it will collapse. You would try to say that it is backed by gold, but no. It has been long time since currencies was backed by gold. Even the gold which allegedly is there to back up some fraction of FIAT most likely is gone and not to mention fractional loans which is absolutely crazy and is another good point that there is little support to FIAT rather than faith and words of politicans. You would say no way Fiat is to strong but there is some good amount of speculations and arguments why wars in middle east broke out exactly because of the reason that one of the biggest FIAt currencies was threatened.