First of all, we need a bunch of guys with a cool idea somehow connected to a blockchain. For example, a startup that will allow you to buy a genetically modified tree and when it will grow- it will have your name on its leaves for a Bitcoin. Sounds pretty insane, but I’ve heard much weirder ideas that turned into a successful business.
Sharing your company with an investor, you sell him a future service. That’s a huge difference, you will get the money but still control your business.