More people does not mean more volatility. It's exactly the opposite. More people mean better distribution and this counteracts volatility.
If you have 100 units of something and 20 belongs to 1 person, 30 to another person and the rest is distributed among 5 other people. If each of these smaller holders sells the price will already move by a lot (10%) and if one of the big holders sell you could have a 30% swing. But what if each person got 1. 1 person selling would only mean a 1% move.
but the problem with bitcoin and altcoins is that there are many people who buy many coins and there are many people who buy few coins each person and this makes a small group own more than 80% of the existing coins. When such institutional investors enter the cryptos market, they will own enormous amounts of coins, they and a very small group that bought many coins to years ago will be the kings
At least it got adopted, even more volatily as we know people have their different reason why they adopt bitcoin, for investment or to look on short profit. It is still better than no one adopt bitcoin and make it have no price anymore.
I agree, if nobody were interested in bitcoin, we would have a lot of people complaining, people would complain for any reason
OP, do not worry too much about it, let the time decide whether bitcoin would become a means of payment or just a good investment.