High prices would mean more stability for one simple reason. It would take a lot more money to move it to begin with. When the price is let's say 100 thousand dollars per bitcoin, if it is already there that means there was a ton of people that sold beforehand and not many early birds are left that bought from very cheap, you also can't buy in bulk neither because buying in bulk would mean tens of millions of dollars at least and probably hundreds of millions of dollars
Mate, you are almost 3 years late
Obviously, you are not the first who came up with this idea. It could have sounded plausible in early December, 2017, when we were yet to reach 20k. But now we have half that price, even less than that, which kinda contradicts such logic. Speaking more generally, if this assumption were true, the price would always have less resistance to go up than to go down, which would lead to ever growing prices. However, reality seems to be quite different, and at higher prices in case of Bitcoin, the market becomes thin which leads to bursts of volatility, as per OP
So, when you get rid of those early buyers until the 100k price that means the price would be more stable with significant amount of money required to move it to begin with. Sure it could be easier since there is no regulations and it could move however it wants but I do not see that much money changing hands that quickly and easily
Yeah, right. I remember that argument about millions of dollars sitting in the orderbooks. Sorry, it didn't work out