HODLING can be profitable for investors. But with the condition that you need a choice of potential electronic coins to buy and hold. Therefore, each investor needs his own research and needs to consult around for the correct decision.
I do not agree with your statement, just the opposite, it is most profitable for investors to sell their coins immediately after entering the stock exchange, in order to get a certain profit from the bonuses that were provided at the ICO stage. That often leads to a strong collapse in prices, and bounty hunters are usually blamed for this.