If your concern is that equities are priced above fundamentals of how much the underlying businesses will return, cryptocurrency is no salve: the underlying fundamentals of cryptocurrency are zero.
We can all decide that shares of Worthless, Inc. are worth a bunch of money and collect them. But we can't really expect dividends or an acquisition premium in the future.
This differs significantly from real estate or gold, which is backed by a tangible representation. With a virtual currency, there is no floor to the amount of losses. Theres also no dependent economic activity to support it right now and any dependent economic activity could be replaced all the same.
I'm just making the point that, if stock A trades for $10, and one is concerned because they believe the "true" net present value of its share of the business of $5... that the situation isn't improved by buying asset B that trades for $10 but has a zero underlying net present value.
(Asset B may very well do better, because underlying values are not the only reason we buy assets...)