Overall, the best strategy is to invest in everything. You get some winners and some losers. The winners increase your value and the losers vanish. Over time, you win.

Four principles: (1) Asset allocation, (2) Diversification, (3) Rebalancing, (4) Time.

Info: Bogleheads.org, Investing Advice Inspired by Jack Bogle: https://www.bogleheads.org/