It's interesting to see that there are always people on the Internet who love to try to disparage a topic among enthusiasts. Some call them trolls.

I think mr. krugman brings up a very valid theoretical weakness in bitcoin. However, I do wonder about his intentions. Why would someone invest hundreds of hours and thousands of posts only to try to prove to others that their work will fail?

I enjoy the story of innovators being told that their ideas are flawed and will not succeed; yet it is those who invest their blood, sweat and tears, like Satoshi and the numerous bitcoin developers and merchants, who can achieve, not the naysayers.

The amazing thing about bitcoin is that is has already succeeded. It has survived four years and plenty of Ponzi schemes, hacked exchanges, and bad press. Maybe bitcoin will now replace the Twinkie as one of the two things to survive a nuclear war?

But all hyperbole aside, I don't think bitcoin is bankrupting visa anytime soon. As mr Anderson has pointed out before, it is more efficient to worry about the short term problems before worrying about how bitcoin will survive when it has uprooted the pillars of the global economy and obsoleted the central bank.