We've pretty much seen that no other currency is going to undermine the US dollar. It is the de facto reserve currency for the World. This has only been further

We've pretty much seen that no other currency is going to undermine the US dollar. It is the de facto reserve currency for the World. This has only been further cemented by globalization since everyone is now so far in bed with the US via trade that everyone has no choice but to let the US keep racking up a national debt. Questioning that debt and forcing default would be tantamount to economic mutually assured destruction. For China, it knows the Yuan is never going to be a real competitor to the US dollar, since there is even less trust in China, since it has been so willing to manipulate exchange rates with its own currency. AFAICT bitcoin presents the only real existential risk to the US dollar. It's a long long road to get there and it might fail spectacularly or simply become just another currency, but even if there is only 0.1% chance of it upsetting the US dollar, that is 0.1% chance more than any other currency out there. Personally, if this does play out, I see the US to be one of the last countries to get on the Bitcoin wagon and lose out. Our currency is the most fit and we have the least amount to gain in the short term from adopting it. But this does not change the fact that many countries with far less stable currencies and governments that have proven themselves untrustworthy with their monetary policies, where the citizens would flock to a currency like bitcoin once security and usability issues are addressed. I'd say that every country where inflation is over 4% per annum is a candidate for wanting to acquire bitcoins.