Really? Multiply the assets for himself, or for the one who has entrusted him with the money?
Typically, multiply the assets for the original owner (in very risk adverse ways, as discussed before), while taking a cut out of the profits,
the percentage depending on what the parties agree on, which effectively happened in this case:
... I claim that the most supportable interpretation is that all forkcoins (ie. coins forking from Bitcoin's block chain and calling themselves "Bitcoin") were forum property from the beginning. (I do not claim this for airdrops.)
theymos got all the hard forks with Bitcoin denomination, while OGNasty keeps the airdrops, both parties feel content that it's a fair distribution of the net profits generated by the preservation of the forum's BTC, the original task that the treasurer also successfully completed, so all in all most independent observers would agree this collaboration between theymos and OG has been fruitful and beneficial to both parties...