As a truly epistemological question, it's turtles all the way down. But if someone gave me a $5k retainer, I would easily be able to spell out the best practices I know for securing digital assets like cryptocurrencies. Ones that *don't* involve giving them to me, and so I simply could not steal them. I would also suggest they go get a second opinion to independently verify my advice (or vice versa). A third or more, if they are really cautious. Tony would still have over $4.7 million if he had done that sort of basic due diligence. ce83ae7447fb93daee7a108c0b309326d0175aa196a2b50412138a0423b1344d