The price of Bitcoin is already very high, it cannot be denied that there must be many investors and HOLDERS who have 'cashed out'...
for me, it is not a big problem to 'cash out' at this time because of course there are many who have made a profit, but for those who have 'cash out' they must be prepared to buy Bitcoin again when the price drops.
I agree, there is no problem if we start to sell bitcoins if we are already get profit from the current price of bitcoin now. all returned to the our goal, having bitcoin for future investment or getting profit when bitcoin price go up. but if you sell now you will probably get a lot of profit. if bitcoin proce doesnt last long, it will come back down. all sellers will be prepared to take profit again.