Past performance is not indicative of future results. Japan stock market JP225 didn't recover yet from 1990 crash.
For a US centric view: https://www.investopedia.com/articles/investing/032615/how-t...
Adjusted for dividends since 2012
VUKE - Vanguard UK 100 up 100% VUSA - Vanguard S&P500 up 350%