Looking at the bitcoin price chart, I do not agree with your observation. It's true that shortly before the chinese new year (2018), Bitcoin was enjoying a super-high price (arguable, considering the crazy high transaction fees, but that's another story); however one year prior, Bitcoin wasn't doing anything special around the chinese new year at all, in fact it wasn't until several months afterward that the price began to really climb, and this was probably due to factors that had nothing at all to do with the chinese new year. In other words, you may as well pick an arbitrary date that you saw the price rise in one year, and see if it repeats the next.. in the meantime, consider that the opposite of your prediction could also materialise, and don't bet all your eggs on a potential price rise that may never happen.. as always, you take your own risks and this is just supposition, but I feel that the evidence does not support your theory in this case.
Yes, I never understood this, "The price rose at this time last year, so the same will happen again." Especially when known specific events affected the prices. Like in 2014 it was the Mt. Gox thing, people see that the price went down at that time and so they say, "No need to worry."