When the U.S. goes bankrupt, they are going to regret having sold enough bitcoin to pay off the national debt, for a present value similar to filling up one SR-71's fuel tank.
I think we should petition Janet Yellen to have the Federal Reserve buy one 3000 bitcoin chunk at the auction and put it in cold storage. Just one. Not because they will do it, but so we can say I told you so in 5-10 years.