Certainly, bitcoin is becoming a world wide currency, and will grow bigger in the future. Half of the places I go now, all except bitcoin. 
I guess that's a good thing for us investors. BTC
A global currency, yes. A major global currency, unfortunately not, and it seems a long way off happening too.. I guess that's a good thing for us investors. BTCThere is a long list of countries that are being screwed over with negative interest rates and massively devalued currencies, people in these countries would have done very well getting their money into bitcoin a few months ago, but as can be seen by the low price, they aren't really doing that.
I guess price volatility is still too high, or upwards price volatility too low for people to be tempted in on mass.
Even if the volatility of price is not that great we can still consider Bitcoin as a phenomenal coin. It is still great for investing, you'll catch some big fishes for sure.