With the stratospheric rise of Bitcoin the altcoins should move big time as well.
But they do not and will not move, as all the institutional money is pouring into bitcoin.
We won't see a "year of the altcoins" for a very long time, at least not before bitcoin has reached one million.
I don't completely agree with what you said, the claims you make are as if you say altcoins don't have a bright future. Indeed there are thousands of altcoins circulating in the market, but we can't say all altcoins are trash. Take a look at how the skyrocketing prices of ETHEREUM, BNB, POLKADOT, LTC and some other DEFI coin.
You need to underline, when the BITCOIN price jumps up, Altcoins will also follow the flow of bitcoin movements. There is nothing wrong with investors putting all their money in bitcoin, but most investors have profit lot from Altcoins.