now is not the time to hold back but it's time to sell, the price of bitcoin now can say is high, so that's why it's better to sell it, but if it predicts that prices will rise again bitcoin, then hold it until the price goes up
In long term view bitcoin will always go up in price. Holding bitcoin must be in long term so that we can make profit definitely. Only the daytraders can buy and sell bitcoin within a day or in short durations. Holding bitcoin must be a profitable idea as per the so far history of bitcoin.