Considering the current level of exposure and the peeking interests of government institutions, there's going to be a slower than last year improvement in the market.
But the following outcomes are possible:
1. $1T USD before December 31st 2018, at which point the system becomes viable for a fractional improvement in the coming year.
2. Bitcoin's market share is most likely to dwindle.
3. Altcoins are likely to be more competitive as newer models with scalability features are to be rolled out this year.
4. ICOs are on the verge of complete absorption. ICO 2.0 platforms will thrive on this premise.

So the market cap may attain higher heights, but staying at such levels will be more difficult.