Yes you are and yes you can You're just not entitled to make a billion dollars from it.
Discussion
Nobody should have a billion dollars. That would make everyones standard of living extremely high. Only the very greedy ignorant, and selfish would opposes such a redistribution of billionaire wealth.
Why shouldn't they?
There is no legitimate argument for why people shouldn't be able to have an amount of value. Anyone trying to dictate how much value a person can hold is a supporter of tyrants or the tyrant themselves.