"In 100 years the US dollar won't be around, but bitcoin will be."
Two claims, no justification.
I'll leave the bitcoin issue to the side, since while I don't believe bitcoin itself will be around in a century, I have no trouble with the idea that /some/ crypto-currency will. Claiming the US dollar won't be around is kind of weak, though. It's too easy and too popular to predict doomsday, with little to no evidence, for these sorts of claims to be taken seriously.
US dollars have been around for more than 200 years. The British Pound, more than 500. The Chinese renmibi/yuan is over 2000 years old. Based on this, I'm going to say that the safe money is on the US dollar being around in 100 years.
A country issuing different currencies is not the same currency. The US has not had it's current fiat system for 200 years, more like 30 -- with a smattering of different systems in between. Same with the Yuan.
Two claims, no justification.
I'll leave the bitcoin issue to the side, since while I don't believe bitcoin itself will be around in a century, I have no trouble with the idea that /some/ crypto-currency will. Claiming the US dollar won't be around is kind of weak, though. It's too easy and too popular to predict doomsday, with little to no evidence, for these sorts of claims to be taken seriously.