I agree. I have a Ledger Nano and whenever one of my coins doubles I sell half and take profit. No exchange is 100% safe and a lot of people keep money on them in the hopes that maybe they will get in on a dip and sell on a moon. Realistically, myself included, most people don't really understand how to trade crypto to be consistently profitable. For 95% of people their best option is to buy coins and put them in cold storage for a year.
People should take comfort in the fact that we are so early in the market that 5 years from now they might be sitting on a few 100k that they would have lost had they panicked and sold.