For example, in Japan already in all use bitcoin. What kind of bubble can there be? Of course, if you create difficulties for him, you can really think so. I think that in the beginning great popularity will be used by small countries to use bitcoin, only then will big ones come
They are calling it a bubble because of its incredibly fast growth, but there hasn't been anything like it since the invention of the Internet. Facebook has been going through a similar stage, the difference is that it's not a tradable asset, just a company, while BTc is independent and decentralized. While FB can be shut down by the US gov, BTC can't, but i'm sure you all know it already. I hope the naysayers will realize it too and better sooner than later (for them, not for us).
Yes, the best point of bitcoin; it's decentralized monetary system which can't be stopped by the government even if a country ban bitcoin, doesn't mean people can't use it as a medium of exchange, to transfer funds everywhere across the globe.
It's enough with the word of "Bubble", bitcoin has real usability as an alternative currency, although bitcoin network still can't afford massive transactions.
Bitcoin just need two things to achieve another milestone; proper scaling implementation and acceptance in some countries such as in Japan.