Ultimately, all "money" these days is supplied by central bankers.
There aren't a lot of good ways to short this stuff, at least if you aren't someone like BlackRock. That's especially unfortunate because it means no one is going to make money on the downside, offsetting others' losses. In every transaction there is still a winner or a loser, it's just that in this case the winner is going to be the people selling chunks of worthless companies for big money today. Just like in 2008 the winners were people who sold overpriced and overhyped real estate in 2006 and 2007. So if I were you, I'd go found a worthless company, pay the "tech press" to hype the holy living fuck out of it, raise a dozen rounds at obviously nonsense "valuations", and use the money to pay yourself and your friends nice fat salaries and lots of silly perks for the next 3 or 4 years while everything implodes around you. That's not how you short the madness, but it's how you profit from it which is really what your question is about.