@momsage Well obviously it does not apply to $MJ or $RUN. OP mentioned ETFs that simulate the entire world economy, for which the MSCI All-World ETFs are a popular choice, and what I said applies to those.
For example: https://www.justetf.com/de-en/etf-profile.html?isin=IE00B4L5Y983#overview...
@momsage
I'm generally a fan of these ETFs, but remember with them you are mostly just investing your money into the biggest of the big megacorps, and mostly focused in the big economies - US, UK, Germany, Japan and sometimes China.