Doesn't matter which kind of GDP you use - it won't tell you how wealthy a country or its people are.

That's because GDP measures how much you did in one year, and wealth is accumulated over centuries.

Using GDP to measure wealth is like using speedometer to measure distance. You can be the fastest on the road at the moment, but if you just started driving and people drove faster than you for 100 years it doesn't mean much.

You need to integrate it over time.