I think we will never see Bitcoin stable at one price, but with time and the price rise there will be less volatility. In last month Bitcoin was over $40k, went to $32k, now it's $36k... it can drop or rise for +10%, and that can be a lot! I believe when Bitcoin hit's some very high price one day, changes will be under 1%...
And of course we can always try to spend some coins, maybe with the price rise we can expect many countries to adopt it and we to be able to use coins wherever we want. Traders will trade if there's volatility, holders will hold anyway, I guess spending some from time to time is good, so there're tree choices of what can someone do when Bitcoin hits 6 digits, or 7 one day!
Bitcoin can "stay" stable for a while, but that is usually not for too long. Just to give an example, during august and September if I am not wrong it was basically 10k all around, it was around 10-12k range and never moved, and we are talking about over 60 days or so not playing that much.
However the funny part is, from 10k to 9k that is 10% change, from 40k to 36k that is 10% change, so people saw 40k to 36k as a HUGE thing, and you did too, but back in the day when it was simply 10k to 9k nobody really cared all that much, there was none who assumed it will crash and burn just because of that. So I believe as long as a drop is under 20% that is fine, going from 40k to 32k is fine, there is really nothing to worry about there. Obviously we are moving a lot up and down but about 10-20% range is nothing new for bitcoin, it always moved up and down that much.