Well if that's the case - that he's actually buying shares in some underlying company - then I'm just misunderstanding. Again, my knowledge is very superficial here - at a glance it looks like Kucoin is just an exchange for other bitcoin markets. But if it's actually an exchange to buy shares in real companies, then that's a rather different situation.
> Kucoin is just an exchange for other bitcoin markets
Again it sounds like you're confusing the words "bitcoin" and "cryptocurrency".
They are a cryptocurrency exchange. You can trade Bitcoin for other cryptocurrencies (such as Ether, Litecoin, etc).
They have issued their own cryptocurrency called "Kucoin Shares", which represent a share of the exchange. I'm not sure exactly how this works and if it has any legal weight, but they pay some percentage of their trading fees to holders of these shares
