1) Genius
2) Anti-Bitcoin
Pick one. Specially as an economist. If he can't see the actual genius behind Bitcoin and if he can't see the endless disruption that it is going to do once things start rolling in the next decade, he just yet another former genius that goes from "genius" to failed prophet.
I agree. But I'm not even sure, if Krugman deserves the title "former genius". To me, he basically part of the dying Keynesian system that has produced the biggest fiat money bubble in history and will lead us into dark ages.
The scholars of the economic mainstream are all alike: They fail to take reality into account and most of them are servants of the status-quo-governance.
It's great to see them fail, because they've done nothing good to humanity.
ya.ya.yo!