Sure, BTC is the future currency but that doesn't mean we are no longer need dollars or fiats.
President Nayib seems to cheer himself up or he really plans to remove dollars in El Salvador? But I am not sure it can happen, we cannot deny using fiats/dollars, especially for economic business purposes among countries. I mean, if you want to buy any kinds of stuff from other countries, they will ask for the payment in fiats/dollars, not in crypto coins.