Why the US is still relevant. Tech companies in the last 20 years.

NVIDIA's market cap is bigger than Germany's entire stock market. NVIDIA, plus Apple and Microsoft's are bigger than China's stock market. The magnificent 7 (add in Facebook, Amazon, Netflix, and Google) represent about 1/3rd of the market cap of S&P 500. S&P 500 index funds represent a huge share of many people's retirement accounts.

This will tumble in the next decade of course.