Don't the Winkelvii have large Bitcoin holdings, whose value they presumably wish to drive upwards? Sorry, but I think this is a case of a market remaining irrational for longer than some people can remain solvent. I don't intend to waste money betting against it, but I'm not impressed. A couple of years ago people were predicting the price of gold was headed for the stars too, and a lot of them have lost money since.
depends how far you go back on gold prices, 50 years ago buying into gold was a great idea. 10 years ago, maybe not so much, bitcoin is currently at the very early stages so buying in now could be considered cheap in 10 years time.