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I remember reading something about multi sig operations? We'd presumably have to get multiple clearances on each transaction along the way from multiple parties not related to one another?

Ah, yeah, that's a possibility that I hadn't considered. I'm not sure how well Steem's multisig capability has been tested, though. I'd like to see it proven for a while with smaller amounts before we trust it with that much value. Could be rock solid, but it's beyond my expertise to know.

Remember POW mining and @supercomputing?