That would be offset by a one-time surplus of Godzilla meat.

Meh. Even assuming the flesh isn't toxic (which it totally is, and radioactive to boot) Godzilla weighs, what, 200,000,000lbs[1] which even at a ridiculous Wagyu price of $300/lb (and assuming every ounce of the bastard is meat) is only 60 billion dollars - the square root of fuck all in this context. And he died in the southern hemisphere summer; it's hot as balls in Cape Town in December so his corpse starts rotting pretty quickly. Certainly faster than you could butcher a hundred thousand ton monster with bombproof skin.

[1] https://x.com/TohoKingdom/status/1129168820944265216 screengrab from Monarch showing fatty's weight at 99,600 tons.