Bitcoin is volatile in nature since it is a market based cryptocurrency but there are no patterns on the movement of bitcoin and such similarity may just be a product of a coincidence. Let us look at the facts back to 2013 and 2014 when bitcoin crashed its value from 1000$ to 300$ but it never occurred again. If history repeats itself then bitcoin could not reach its value today since if the theory was true then by 2015 bitcoin could hit 1000$ and will fall back to 300$ and the same will repeat again to 2016 and 2017. Though there are price crashes but all of those are different and unique to each other.
They are unique with the each other but my point is all about the "events" dependency. I mean what fluctuates the price is all about the events that are happening in the world. The topic has got some sensitive points as we see in everyday life. Just look at any down movement or up surge of the bitcoin then you will notice how that is relevant to the good or bad news that happened around that time point.
The current year is all about the same dips and ups and kind of similar events to the last year. Thats what catching this fire of anomaly to my mind. Off course you are true at your point but what I am saying is around the corner and you will see how the Q3 & Q4 will workout the aftermath.