I think it is easy to see that the S&P volatility over the past few years has been extremely low, based on historical average. The constant pumping of money due to artificially low interest rates has created many bubbles. The search for yield will eventually end up with a lot of significant damage across the investment spectrum.
The minute rigging stops, the 401Ks, pension funds, bond holders, REITs and many others will be a world of hurt. I hope cryptos stay uncorrelated and even inversely correlated to the legacy investment world.