>>> buy shares in US companies That is not quite correct actually. You have to pay US taxes on US shares, doesn't matter where you are. They can be quite high

>>> buy shares in US companies That is not quite correct actually. You have to pay US taxes on US shares, doesn't matter where you are. They can be quite high, something like 30% of yearly profit. Then you have to pay local taxes too, that can be significant as well. This makes US shares non viable for most Europeans. The double taxation makes them worthless.