Earlier quoted context omitted.
How do you support the statement "It goes up 5-10x, then crashes to roughly 2x where it started, stays still for a while, and then repeats"? It was flat for a long time, it rapidly peaked at somewhere north of 19k, and has been on a fairly steady decline for most of the past year, with occasional price spikes. If what you say was true, the price would be rising. Which it's not.
You seem to have chosen arbitrary time frames. You know that after 2013 it was stagnant for several years, right? > then crashes to roughly 2x where it started, I consider it to have started in the beginning of 2017, around $1k.
Can you point me to a chart and time frame during which the behavior described was occurring? It looked like it did something sort of like that (but not at the magnitudes described) a couple of times in the runup to $19k in late 2017, and I see a big spike in late 2013, but I don't see any sort of real pattern of any type, other than the fairly consistent small price spike after a big drop that comes from people buying at bargain prices.