In my opinion, taking some of the profits from altcoin investments is a good move when the price rises. it is an opportunity that cannot be missed because we don't know whether the price will continue to rise or even when it will reach its peak. Therefore, while the price is rising and it is profitable, take the opportunity to make a profit.
That's what the majority is doing.
Those that can't dispose their altcoins and turn them into profit are holding it for their own purposes. Maybe the profit isn't enough for them to cover.
Or, they've got some other better plan that's being on its way as they hold it.