These are inevitable market movements, you just have to be prepared for this. Also, if the asset is strong, then the drop may not be very large.
Unfortunately, a not-so-strong drop is, for example, 6 times. From ATH 2017 to ATL 2018,
BTC has decreased by 6 times. Are
BTC one of the most powerful cryptocurrencies?
Bitcoin has the biggest capitalization and it is the most stable cryptocurrency. But even the most stable cryptocurrency dropped 6 times. The situation with other cryptocurrencies was even worse.