Op, the answer to the question in the title could have been so short, maximize my income.

Let's be serious, there is no debate here if we're all honest, in 99.99% of the cases this is the answer that will apply to everyone posting here, there is no other "goal" and if we try to hide behind accumulating experience, knowledge etc, etc the long term expectancy of these personal improvements will still be finding ways of maximizing the profits taken.
My estimation: If I collect 10k then 30% APY will give me 3k in a year and 250$ per month. I think that impressive for a middle-class family.
Depends where you're living, 250$ won't be enough to pay for rent and utilities in like 99% of the EU, and it's 6 times lower than the minimum wage per person in France. Now that I google a bit and see India has a monthly average wage of $437 , 250$ sounds less and less "impressive".
Also as mk4 said, an APY of 30% continuously for years is clearly unsustainable, if we go by the compound interest year over year in 20 years from 10k you would have 1.4 million, do you know how much you will have in 40 years?
