This statement makes no sense. If the price is low then it is time to buy, because it's a good opportunity for traders to make profit in the future. Besides, for a day trading it doesn't matter whether the price is high or low, the only thing which matters is volatility and we have a lot of that recently. And for those who want to exchange their coins for USD, well, now it's definitely not the right time for that, but no one can tell when is the right time. If, for example , Bitcoin rises to $10k in two days,  no one can be sure that it will not rise to $20k during the next week.