Hmm lets see, China no longer can try to manipulate things because they already shut down everything (though granted not the mining). So no more FUD from China most likely.
Wall Street is planning on entering, first just with futures to bet on the price, but ETFs and direct hedge fund buying of Bitcoin should also happen in 2018 so that is suppperrrrr bullish.
Organic user growth is going crazy and that will continue so bulllliissshhh.
Square starting to implement Bitcoin into their traditional payment mobile app will lead competitors to do the same so bullllissssh.
With two years of solid growth under Bitcoin's belt, including the amazing year this year, people are going to keep have high confidence that Bitcoin will be more valuable in the future so bullllliiisssshhh.
Segwit will hopefully achieve full adoption in the early part of the year which will reduce fees for at least the time being, unless adoption is up so much that even full segwit blocks are getting filled by the time it is fully adopted. So this comes down to will Core decide to raise the block size limit. If they do very bullish. If they don't the problem will at some point result in bearish.
Will LN hit in 2018? Is LN network even a viable solution? If yes, super bullllisssssh. If no, then block size MUST be increased in the meantime to get fees down. If neither thing happens bearish
but if LN and block increase or even at least just LN happen then bulllllishhh.
Overall very bullish. I think first half of year is guaranteed to be super bullish, but scaling issues will need to be dealt with by then if it is going to keep rising to $40k+ or $50k+ by end of year.