It is a popular opinion on HN that a population should wish that. Mostly because of corruption, evil financial institutions, inflation is bad, technical superiority, ...
At the end of the day, it does not really matter. The people that have the power to adopt it listen to different arguments. Although a lot of them recognize the same problem as people on HN, they share the same opinion as you do. The others have no interest in changing a system that favors them. So the point is mood regardless what my opinion is.
The only other option is to have the population impose its currency. In a lot of third world countries, the USD has been adopted as a alternative to the local currency. They could adopt bitcoin. To them, the possibility to build complete financial services outside the official channels is good. Having a currency controlled by few rich people rather than the US government and few rich people could be perceived as an improvement.
Difficult to see that happening in the biggest economies though. The balance between corruption and general interest is good enough, and there is just nothing for the consumer.
The key to bitcoin success is the balance between popular interest in emerging nations and the games the financial institutions of the first world nations extracting as much profit out of it. Significant success in that area could force first world economies to deal with bitcoin as a currency, despite its flaws.
After that, eventually, I guess there is the extremely remote possibility that bitcoin proves a better currency in the long term and gets adopted (for example, in a world where growth and recessions alternate all the time, it may become beneficial to rely on a currency with predictable deflation / inflation curve rather than a man being a printer )
That's an awful lot of ifs.