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I've suggested previously to look for people who already have a very high reputation amongst the community and have a history of holding and returning large amounts of money in the past (people like Dooglus etc). People who are already multimillionaires and have businesses here with reputations to keep are unlikely to run off with money they've been entrusted with. Alternatively and to rule out any shenanigans, maybe it's better for thyemos to just hold the money himself in maybe a safe deposit box and get some sort of legal contract drawn up in case of his death (or whatever) that the money will then be sent to certain trustees or to certain trustees multisig walllets.
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