Bitcoin and the other crypto have the volatility for the opposite reason, that is they are too young, and for this reason the market has yet to
understand and discover their real value; when this happens we will find few fluctuations and price variations in the market, which will be regulated and clear (like the traditional ones), as it happens today in the historical gold market.
But when this happens, you will have Bitcoin stable at around $ 10 million

Such claims are bordering on insane
Most of Bitcoin's value (and even more of altcoins') comes via speculation. The real value of cryptocurrencies, i.e. the one determined by real-life use, is close to zero. So, I'm afraid, Bitcoin is rather going to be stable at around 0 if it finds its true value one day. The good news, though, is that the speculative value (which accounts for like 99% of Bitcoin's price nowadays) is enough to keep its price up and make plenty of room for volatility at the same time (which is another good news for most of us)