if Gold can be irrational for 2k years, I don't see why not bitcoin can't, the only think gold has going for "longer history", yet HN folk love to say "past performance are not an...bla bla", yes it also has the 5% - 10% industrial use, but bitcoin has that too by being able to transfer it without third party, so will also not go to zero because will be useful as transfer of value.