Competition between local currencies Vs crypto currencies are in peak now. Crypto currencies have occupied currency market causing local currencies enforce (banks) banning of crypto currencies. We can see number of investors have turned towards to bitcoin and other crypto currencies with large scale. Will there be a chance / time bitcoin and other crypto currencies rule over currency market and local currencies get disappear slowly in a decade or two?
No it will never replace the true fiat and bitcoin is just a virtual crypto currency that don't have a paper money, and we cannot use a single currency for all the country because we use our own currency since we gave birth.
It is dependent because we have decided to make it dependent. Sure, their value is measured mostly in USD, but that does not really mean they cannot stand on their own, or we can get to make P2P transactions easily without having anything to do with fiat. Nevertheless, even with all these aside, local currencies have nowhere to go unless we want to deceive ourselves. As it is, with regulation, we end up seeing them co existing and that is what I believe we will get to keep seeing over time.