Sometimes we have to be realistic, the price of bitcoin rising is almost a week and usually the trend will be negative again, for those who have bought when prices below $ 20k then I suggest to sell, if the price looks normal, the price graph looks stable then we can buy again.
Buying again is when the decline occurs again like today. Because if you sell and then buy again at the same price, then there will be no profit. And I think your advice is only suitable for those who hold Bitcoin in the short term, while for those who like to hold Bitcoin in the long term, definitely will not sell all the Bitcoin they already have at this point.
Because they are still quite optimistic about Bitcoin.