The Bitcoin market is becoming more populated, and it has grown more than what it used to be years back, most people in the world today now knows about Bitcoin and cryptocurrency and a lot of them are getting in on it. The market is huge, and there has also been increase in the number of investors and users, so having the same rate of fluctuations as of before is not going to be possible. The market is no longer going to spike or drop as it used to do years back. We have seen series of events that would have let to huge increases in price in the past, but now it's never the same.
The market is moving towards stability. It's no longer like before when the market cap was small and few people holds the coins and are able to manipulate it.