in dealing with high volatility, altcoins are indeed more volatile than bitcoin, but in anticipation of a bearish season, I think investing in bitcoin or altcoins at the top will be better, given the high level of investor confidence and high market volume, in that case it seems not easy to be played by a few people, and later when the bull market comes it will be able to enliven the cryptocurrency market
That's mainly because of low volume, low liquidity and also low marketcap as well. Bitcoin has higher in all these categories than all altcoins, most of them combined even. This means that it would be very hard to make it go up all by yourself, but there are coins where you can literally buy 51% of the coin with just a few million dollars or less, entire out of top 1000 section is like that.
This is why when you are investing into small altcoins you should be trusting that everything will be alright and hope that it will get higher, if someone attacks it and buys it all, or even worse sells a bunch of it, then one person could ruin it for most altcoins.