My Top Stock to Buy in September

Imagine this scenario: You stumbled upon a blockbuster gadget. If you sell your gadget in bulk right now, you'll personally make $500,000 over the next year. However, you have no guarantee that anyone will ever buy the gadget again -- the competition is closing in fast.

On the other hand, you could give the gadget away for absolutely free right now, but you'd get $40 per month for each one you sold for a very long time -- though the actual duration is not certain.

Which do you choose?

Source: Fool.com