The prevalent theory is that once mass adoption is achieved and there's like a lot of money into bitcoin, market cap goes to the moon, liquidity will be very high, several financial mechanism will be available to stabilize the price and by then no more volatility.
I am not sure what to expect from the future of Bitcoin because allot can happen in the mean time. The Bitcoin can go really good and be worth allot of money.
It can also go down and end up really bad which is going to result in all the Bitcoin users leaving.
a lot has been invested in bitcoin and i am talking about a lot of money in bitcoin as traders (whales) and a lot of money in mining farms so none of these people would want or let bitcoin go down.
also there is no reason for it either. bitcoin is growing day by day and getting adopted so it is actually moving towards the better days.
Besides being obtained by mining, bitcoins can be exchanged for other currencies, products and services.Bitcoin is the largest of its kind in terms of total market value. so no one will leave it , the future will be too better.