After seeing the recent big drop in the price, I don't think that the volatility in the price is falling. It is the opposite and we can witness really interesting price changes. For example, Bitcoin price plummeted by 10k dollars recently in only half an hour. And I must admit that it was really scary as we witnessed such thing for the first time I guess. I think this proves that we will never see a change in Bitcoin's volatility in the future also.
It's still the same as before, we think the volatility is down because the price becomes stable, no big pumps and dumps, but multiple events can easily influence the price, so after bitcoin thrives and becomes popular, volatile movements become frequent. Bitcoin still operates the way it should be, there's a chance for the volatility to fall not very soon, but I think the chances, for now, are low as we see the community has grown significantly.