The number of billionaires in the world has increased from 470 in 2000 to 2,095 in 2020, according to Forbes. But it seems to be stagnating since 2017.
How many billionaires (in nominal USD) will there be in 2030?
This will resolve according to the number of billionaires in 2030 according to the Forbes Billionaires list. If Forbes publishes multiple reports of billionaires, the greatest value in 2030 will be used.
The question resolves ambiguously if Forbes doesn't publish a list of billionaires for 2030.