Global wealth would have to increase a lot for everyone to become billionaire. There are 10 billion people. So everyone being a billionaire would require a global wealth of 10^19 $ (= 10*10^9*1*10^9) for perfect distribution. Global wealth is 600 T$. So it would have to become 16.7 k (= 10^19/​(600*10^12)) times as large. For a growth of 10 %/​year, it would take 102 years (= LN(16.7*10^3)/​LN(1 + 0.10)). For a growth of 30 %/​year, it would take 37.1 years (= LN(16.7*10^3)/​LN(1 + 0.30)).
Global wealth would have to increase a lot for everyone to become billionaire. There are 10 billion people. So everyone being a billionaire would require a global wealth of 10^19 $ (= 10*10^9*1*10^9) for perfect distribution. Global wealth is 600 T$. So it would have to become 16.7 k (= 10^19/​(600*10^12)) times as large. For a growth of 10 %/​year, it would take 102 years (= LN(16.7*10^3)/​LN(1 + 0.10)). For a growth of 30 %/​year, it would take 37.1 years (= LN(16.7*10^3)/​LN(1 + 0.30)).