What you are saying are basically the two possibilities that are always there. The chances of Bitcoin to go up or down are always present for a volatile market. There are always some reasons for Bitcoin's value to go up as much as reasons for Bitcoin's value to go down. That is why we need some analysis, brilliant ones, to know which direction Bitcoin will take. But either way, holding Bitcoin is always good.
Absolutely, BTC price is destined to raise. But nothing goes only up all of a sudden, there is always going to be pullbacks and swings of momentum (temporarily). At this point in time BTC is obviously much higher than it was just a few weeks ago thanks to the China ICO ban FUD, but in terms of momentum the situation is very bullish as it's exactly in situations like this that BTC had its biggest price increase. I'm definitely not selling until the fork, and probably not even after it.