Since I am reading "Number Go Up" right now, I don't doubt the S&P advice. On a general monetary basis, the S&P is the closest link we have to a Natural Resources economic index (see normeconomics.org). The effect of all other investments affects the S&P either by debasing currency(inflation, crypto) or changing demands for resources (demand increase or destruction (wars, government stimulus). Crypto seems to be a bet on debasement and replacement, but with lots of stacked pyramids and shell games in the process. As long as resources hold up and the government remains incompetent/ineffective, then the game will shift to Bitcoin, but the S&P will be the pivot/anchor point unless the USA fails.