The reason for bitcoin drops is probably because of the increasingly widespread crypto world competition. Many new and old coins that have an investment value are almost equivalent to bitcoin. It makes bitcoin investors move elsewhere to try new luck.
I agree.. many people who have learned enough about crypto have decided to move on to their best coin of choice. One other factor is the regulations concerns about Bitcoin involving many powerful govts. This has still not been settled which I think is why Bitcoin and cryptos in general aren't growing in demand yet..