I don't want to sell. I want my company to get big so we can do the exciting work I see a company like ours doing down the road a few years. It isn't about the money, I don't want to lose my chance to influence the future by creating it.
(We are not yet funded and have no obligations to investors)
I don't have investors yet. Don't care about the money.
If I get rich, I want to do other creative stuff with the money. 15 million is an institute for music composers, with access to staff, instruments, and state of the art music labs. 50 million is a non profit to design next generation nursing homes and non profit business models that improve care by spending more on staff and being endowed. 100 million is a center for the study of consciousness, to patronize great thinkers, and provide the resources for any kinds of interdisciplinary collaborations the smart folks need. 250 million is a center for the study of space and time, where philosophers and physics could work together to address fundamental questions with no academic requirements and many resources.
I'm not giving up my chance to build up a google size company and do all that other stuff for twenty million.
Selling one particular startup != "giving up my chance to build up a google size company". Not to mention that your chance of making a "google size company" is almost indistinguishable with zero (no matter how good your idea or team is).
(We are not yet funded and have no obligations to investors)