If you don't mind taxes or possibility to gov seizing your funds. He is actually correct. Places like coinbase offer way more security then most people could, and their funds are mostly insured anyway. I know it's against the whole original idea of owning your own keys, but i sleep safer when i know there are more safety measures keeping my assets safe then trusting myself with them. Hell i even lose my car keys all the time.

One of the major reasons why people didn't want to hold cryptos in exchanges back in days was the fact that they were unsecure, unregulated, waiting to be hacked or exit scamming and most of the smaller and new ones still are shady as hell. Luckily you can easiy regocnise them because they do serious amount of fake volume without any real liquidity.