Actually it did not really matter when the next bull run will start but what matter is that alot of adoption especially the instructionals' one is going on and many people are becoming aware of blockchain technology these days than in the past. I believe that we are better off now than before and the next bull run may be next year or 2020.
What I am even much particular about now is to start seeing real life usage at least as that is what would make any uptrend as well as bull run a bit sustainable in the long term. At this stage, expecting a bull run is all going to be based on speculations alone and I do not see that as something we should be after at all, and at this point in time, I would rather see just a slow adoption until we are able to see the real life usage kick in and in that case, at least, we want to see it happen because of mainstream adoption and not because some people are deciding to get greedy.
If a major news like approval of an ETF will be arriving then we can be sure about next bull run at a fixed time frame. Without any that kind of sure shot things, we cannot predict when more number of new investors will join bitcoins and how far they will take the markets. Being patience and waiting for slow progress is the only option for all the long term holders.