2018 might be a good year for some of the major altcoins, but I have my doubts about the performance of Bitcoin. Two of the major things Bitcoin needs to address is transaction speeds and fees.
Segwit has been doing an amazing job in getting the fees to decrease immensely, combined with the insanely low number of unconfirmed transactions. At this point a few cents in fees are enough to get your transaction confirmed within two blocks. If you want to spend plenty of outputs at once for a tiny fee, then this is the time to do it. If you follow LN (definitely do so if you haven't been following it yet) then you'll understand how fees, confirmation times, transaction processing, will no longer form a limiting factor.
I think now more than ever what Bitcoin needs is stability in its "value".
It would certainly be helpful at a later stage, but the volatility in current years is what makes Bitcoin attract capital.
I feel bad for the poor bastards who invested their life savings in Bitcoin when it surged to $20k just to have it shed over half its value in a matter of days. That may not be much to cry about for the Winklevoss twins, but for the common hard working man or woman, that must have really hurt.
I don't feel the same. This isn't a playing ground. It's probably one of the most brutal markets out there. If you don't understand how this market works, and don't have a clue about what Bitcoin is or does, you are bound to lose big time. It's called gambling if you blindly put your money into something hoping that it will result in profits.