Insane amount of money: Of the 10 countries with the highest median income, 7 of them are European. By some measures, the USA is-midpack, with Norway/Canada very similar to us, but missing most of the entrepeneurial/VC culture of the USA.

World hegemony: mostly a function of the post-WWII situation, combined with our willingness to spend absolutely insane amounts on our military and use it to impose or at minimum encourage US interests globally.

Very high standard of living: the US has one of the highest GINI coefficients world wide, so only a median comparison (which is quite hard to develop) really conveys the differences accurately. Large swaths of the USA (notably Appalachia and also the desert southwest) have a substantially lower median standard of living than most of Europe.

Anyway, even if your claims about the USA were true, that by itself doesn't connect them to the VC risk/reward culture under discussion.