That’s why I keep saying: you should critically think and decide about investing more than half your portfolio into one single country market, the U.S…
Sure, you would have fared extremely well over the last 10-20 years… but there’s no guarantee that U.S. outperformance will continue forever. Nor that the U.S. is going to at least perform in line with other markets.
Are we sure it won’t reverse at some point, with the U.S. then lagging behind other markets in the future?
If you can answer that question for yourself („Yes, I believe U.S. will always dominate forever“), then go ahead.