Thank you for raising this important point as far as investment in crypto, stocks or even forex is concerned. Some investors or day traders forget the fact that the volatility involved in these markets makes it worthwhile for investors to take profit at a particular point. The ups and downs makes it a market and also makes the market attractive to new investors. I will conclude by saying whenever there is a deep in the market, its an indication that profit has been taken by those that entered low and this opens up an opportunity for others to get a good entry point into the market.