Yeah, I just didn't say it cuz people would already be thinking it. There's also potentially ³H from seawater for fusion power, and the estimates for how much is there are wrong because the concentration changes at depth, and you wouldn't be mining the average.

By monetize, I mean create enough reasons for people to go do it. Maybe it's just self sustaining - that's a lot harder to do, but its possible, and maybe desirable if you want a semi secret colony (would have to be mobile, too easy to "see" at sea). We're probably not going to be raising cows out t...