What a Company-based ICO would look like ?

Hello ! I'm a newbie, but I am currently seeking informations about ICOs and, more precisely, how a company could make an ICO.

I am not talking about an ICO based on a new tech', or whatever. I'm talking about a company that, instead of doing the standard IPO on the "real" market, would create a coin, and sell it as a share. There would be no value, nor any use of the coin, except that it would literally be a percentage of the company's marketcap (a share, in a nutshell)

The thing is: what if I had a very healthy company, that could make a 10-fold turnover increase in a 3-year lifespan? Would you buy their coins if it was just an asset, and not a tech ? In which extent ? How should I define the numbers of coins / ICO prices ? That's be a shame to fail on that part if everything else is fine.

Something like this. I am really bad with how cryptocurrencies works, and more especially, on what ICO are based off.

Please, enlighten me