Its not completely random so it is predictable to some extent, the problem is you are competing with the market, with professionals and computerized systems. Trading BTC when nobody gave a dam would have been slightly easier, now we got multiple contrasting trends varied by the time frame. For anything like a year perspective do weekly bars, at least consider all the perspectives not just the most comfortable but its certainly not random in movements. Simplest I could say to dictate buy or sell would be something near to the weekly average, if buying above that average and selling if we fail to maintain it you might do well and be well aware more then a few already trade on that basis I'm pretty sure as you say there is money freely available in the trade but it divided between us competitively.
I have seen way too many people who ended up believing in bitcoin to do one movement and look at charts and draw that line, and another person believing the opposite and drawing another line. It is same time, same day, even same hour, but one shows how it should be going down because of the chart he shows, and the other believes it will go up because of the chart they show. At the end of the day I believe we are going to end up with the right one based on luck and not what we know.
It is obvious that we should not be looking at others and try to guess what it will do, and even if we are doing a chart then we should not be having any type of feeling what it would be doing, because if we do then it could impact our way of looking at the charts.