I think everyone wishes you could be correct but the situation where tundra/permafrost areas warm to a point that it is possible farm would cause a catastrophic release of Carbon on par with direct human activity.
My understanding was there are about 50 to 100 years left for large marine fish excluding what it might be possible to farm. Not sure if this makes it any shorter.
https://news.ycombinator.com/item?id=13079066