Is it warranted to feel a little uneasy about the dogmatic advice of "just put all your money in ETFs?" Aren't assumptions that something will always have a fair return the way bubbles are formed?
People don't put money into ETFs to get speculative returns, but better-than-bank-account returns with diversification. Bubbles are often formed by speculation, and usually in a singular asset class.
Yes, but the fed/government backstops the s&p. Your only option really is to invest outside the U.S.
> the fed/government backstops the s&p
How so?
Not necessarily. With ETFs like MSCI World, you simply get the benefits of economic growth.
We already and always live at the limits. Innovation is pushing those limits further everyday. For example, Internet solved lots of limits related to physical locations, distances, and land areas, electric cars and sustained energy production will solve limited oil supplies, space exploration and asteroid mining will solve limited resources of other materials (if they aren't made irrelevant before that by other innovations). Etc..