Bitcoin is simply not old enough to be able to declare any sort of 900 day cycles going on.
I'd say this is a fallacy, but interesting nonetheless, thanks for posting. But I think this is tantamount to a 4 year old ruminating on how there life has been a periodic and discernible cycle of positive and negative 230 day phases of good food and bad food.

Ha ha... nice one.
Can't say I completely disagree with you; there certainly is not enough evidence to say for certain whether the cycles actually exist, or whether they are simply a series of coincidences. I do find it especially interesting that if we apply the idea of cycles, it points to quite a rosy future at least in the near term, at a time when other factors are really looking positive as well (tx rate, exchange volumes, upcoming halving, ETF(?), etc.). So, maybe just a coincidence again, but I also believe human psychology also factors in to this, and so there may be a cycle at play behind it all.
Humans have a very uncanny ability to fit correlations into two separate things that have no correlation and explain it very well. Its really hard to stay unbiased when you hold a stake in an asset that you hope to profit from.