It was called the reserve currency of the world…and then came bitcoin or cybercurrency and the US dollar is still the reserve currency of the world and all of the bitcoin in the world is worth about 100 billion today, Jeff Bezos could buy it all. There is about 14,112.30 Billion USD in circulation.
That's the current value of BTC compared to USD quantity. There are less BTC, which makes it more valuable when the tables turn. 1 once of gold is worth more than 1 USD too.
It ought to, it costs a few hundred dollars an ounce to produce gold. If the tables ever do turn I think Bitcoin has a number of limitations that may prevent it from being a dominant currency. A cryptocurrency may someday in the future be the dominant currency but it won't be for a while and I doubt it will be Bitcoin. Maybe it will be STEEM eh?