If someone in their garage invented teleportation or a cure for cancer or a battery that ran on happy thoughts, why would it not be their money? I'm not saying

If someone in their garage invented teleportation or a cure for cancer or a battery that ran on happy thoughts, why would it not be their money? I'm not saying this is the case I Bill Gates but I'm not sure of any other way to encourage risk taking at the bottom except the promise of obscene wealth.