Exactly...
The new money on the market goes first to bitcoin, then to ether and the other larger altcoins on the market... then it migrates to smaller coins... there is still time to buy some "good" coins at a bargain.
It goes in a way as those who bought Bitcoin during the Big DIP will definitely want to sell after Bitcoin making a new All Time High, not all may sell so quickly but majority. Them selling and taking their profit is for them to quickly invest into different Altcoins this will help pump this Altcoins. This is why most people are now beginning to invest in this smaller Altcoins.
that is normal as the price needs corrections , those who wanted to have short earning or those who wanted
to take their piece of cakes in their Holdings so expect that to come , but as long as you can afford to keep
holding and yes ATH meaning selling for many holdings but there are still HODLER that keeps their funds even
how long will it takes.