$3,000 is just where we were a bit more than one month ago, so stop panicking like it's the end of the world. We may go lower if more people will decide to panic or if there will be some more real FUD, but keep in mind that selling can be as dangerous as buying - Bitcoin can reverse its direction at any moment and sellers will turn into losers. Now is a good time to start buying - maybe not everything in one time but continiously. Bitcoin will go up in the future, it's technology hasn't suffered any damages, it only keeps getting better.
You aren't guaranteed to that - at all. You cannot be sure, as the situation in 2017 is completely different than late 2013/ early 2014. There is simply way more competition out there, and crypto funds have also shifted their attention to those options.
Bitcoin can easily lose on technicals, as it is outdated and vulnerable. It is also highly centralized due to how Bitcoin mining works and no longer anonymous, therefore having already lost its major selling points of the past.
Also, to finally address the greatest mistake you make: an asset cannot appreciate forever. At some point a top will be found, after which price consolidation will start. I believe we are there now, and this is going to take a (long) while. There are plenty of permabulls here that have lost all sense of reality, as they figure that Bitcoin will continue to appreciate forever. It will not.
And don't even get started about Japan: nearly no one is using Bitcoin there, or anywhere in the world in that sense, at least for buying stuff, and the 12 or something nodes in Japan are further proof to that. All of it has been blown out of proportion, and hordes of people have been played - again.
