No shit, but the successful custodians are the ones who have insurance on deposits and enough reputation that people are not afraid of them exit scamming. You don’t physically hold your stocks and cash either.
"No shit" - It's a bit over the top to denounce me here as "Mr. Obvious", but funny, so this shall be forgiven to you. Musk is hot and at the forefront and he said it the other day. There is a lot of running away with bitcoins still/currently (Mt. Gox) and they are not insured. Probably the endgame of Bitcoin: All Bitcoin get lost or stolen, but were reimbursed/payed out via an insurance :-D - The full value of all Bitcoin payed by the insurance.