Altcoins lose value faster than BTC is that's what you need to hear, a 10% loss in price of BTC can tank 30% or more off any altcoins this is why I only invest 30% of money into altcoins and 70% into BTC, the best store of value after stable coins is BTC.
The reason why altcoins move harder is the fact that they lack liquidity and volume. Which means that if you spend a million dollars to buy an altcoin, you may end up doing even 2x on it. This may not work on ETH, but it does work on many smaller cap projects. Which is why there are bigger moves. Change the numbers and you could even have an impact on top 10 coins. So all in all it is not really that easy to finish it all.
I have to say that it is not easy, but also I would like to say that it is more profitable for the same reason as well. Because even though it could drop harder, it could also go up higher as well. This allows people to make a lot more money.