Once you have investors, they want their money to grow, and this is not possible by staying small. We have invested in a startup we work with, and given the high risk of failure, I would not be happy with a meager growth rate of <10% per year. At that rate, my money is safer in the bank or some kind of low risk portfolio. If you have an 80% chance of losing the money, then you better expect at least a x5 return rate when selling your shares.
I'm a big fan of bootstrapping myself, and it's the best model IFF you can get by without investors. If you, like SoundCloud, have a product that does not break-even, then you will need investors, period. Of course you could say - well, just don't make a product that nobody pays for; but obviously there is a market for such products, on the investor side.