Any inputs in the topic?
Yes. Your information is completely wrong.
According to Wealth-X's 2019 Billionaire Census Report, the US holds the worlds number 1 place with 705 billionaires. China is number 2 with 285, Germany number 3 with 146, Russia at 4 with 102. UK is number 5 and India at number 8.
I can't find anything for 2019 for Poland, but in 2017 the country had 4 billionaires.
I have no idea how you could have even come to the conclusion that Poland has more billionaires than the US to be honest.