How can you have 181 million USD in one single wallet? This is really bad decision making and if everything is really lost than there is nobody to blame than himself. Already with a few thousand USD in cryptos I would recommend to split it between multiple wallets. It's going to reduce the risk of losing it considerably and it makes it much harder for thieves or scammer to get their hands on all your coins. Also having backups can  save us. In general though I agree with you that we should store our own coins don't leave them at an exchange. The security risks of an exchange is too big for long periods of time. I would rather lose my money based on my own fault than having someone else steal it from me. If I can't have my own coins than nobody else should have them.