Probably the best way to take advantage of a private market bubble is to sell into it. In other words, pitch a trendy idea to an angel and raise money. Or if

Probably the best way to take advantage of a private market bubble is to sell into it. In other words, pitch a trendy idea to an angel and raise money. Or if not that, sell something that is consumed a lot by bubble participants. In other words, in a gold rush sell mineral claims or shovels. It's much more feasible to do that then to short private investments.