What will happen if we are all billionaire?

Studies have been done on this in the past and here's what would happen: if you took all the money away from the rich and gave everyone on earth a billion dollars, in a few years' time all that wealth would be back in the hands of the 5% of the world's population that had it in the first place. There's a reason why the rich become and remain rich and why so many are born and remain poor. It would make for an interesting social experiment and there would be a few anomalous success stories that emerge from it but they would be few and far between.

I you become a billionaire the value of money will be decrased to such an extent that even a piece of tomato will cost thousands and thousands of dollars and inflation will be more than 90%

a small percent of people would be happy. some would destroy themselves. some would still complain about a lot of things because i know some people who inherited a million dollars and they just complain. and others who have more than me just complain. there are a few people who would be free and use the money wisely and be content.