I think that what is happening is a simple economics. I was taught in economics that once you have either fear or nostalgic feeling in market or product, it either help to push the popularity of the product positively or negatively .
Thus, in this light, whatever is happening is supporting bitcoin to continue the bullish movement and we know or have speculated (maybe rightly) that the incoming fork is responsible for this. This is causing holders to hold tightly and not to release nor sell because they expect some bonus in their wallet.
Again, because people are not selling, it then means few that are willing to sell will do that at a higher rate, meaning many users chasing few bitcoin available.
This theory is however anchored on one of the economics theories - 'the higher the demand, the higher the price'.
I really hope it's the beginning. I mean, this event of the market going on a bull run has been long been awaited by everyone who is in the market, and all those others who still believes in the cryptocurrency market. But, unlike previous happenings and assumptions, I think, this time, there is proof that it is really on its way since many other coins, not just Bitcoin, have already been gaining good value. For example, Ethereum has been growing quite nicely in the past weeks, which is a good sign, too.