Making Bitcoin stable only means one thing, thus it loses its feature of serving as an investment opportunity. The interest of many crypto users have shifted from the day-to-day usage of Bitcoin in purchasing goods and services to holding their Bitcoin for a period of time to gain more profit. However, it is only through regulation that the price of Bitcoin can stabilize.
Yes, it will lose the real value of bitcoin once it stabilize the price, maybe only governments that will regulate it can make the price of bitcoin stable but I think it will really takes a lot of time before it happen.