I think everyone with at least half a brain knows we are in a bubble. What's the reason of latest Bitcoin increase? 100s of thousands unconfirmed transactions? How about all these crowdsales and ICOs based on Ethereum? All these "exciting" projects? Why DGB is close to 900 satoshi? DOGE? My personal opinion is that the price of a coin (or whatever) should be justified with usage and I don't think that usage of digital currencies has increased THIS much. Don't get me wrong - I'm also excited with the latest BTC increase and everything, but I'm always thinking about the future and now I think it looks scary...