I will still use bitcoin even if it becomes stable but certainly not as much as now. It can be said that, besides the need for profit, today with the loss of trust in banks, people are also starting to value privacy more, so bitcoin will still be an option even if it is not profitable.
Like others, I believe bitcoin will never become stable. Maybe as bitcoin gets bigger, its volatility will be smaller, but it will never be stable, as long as it still makes a profit, the demand for it will always increase.
Not as much as now? So okay what use you are doing with your Bitcoin right now? If you are only using it for investment, then I think you aren't really heavily using it because when you invest, you just let your Bitcoin sit. There are two kinds of Bitcoin users.
One is those who make use of its volatility or those who treat it as an investment asset or trading asset and the second one would be the people who only use Bitcoin as an alternative to fiat for sending and receiving money without restrictions. When Bitcoin becomes stable, obviously there are still people who will use it. Like you I also think Bitcoin will never be stable anymore so us who only use BTC for investment of for trading should not worry.