I am wondering if there's a huge probability of bitcoin investing will become a company's focus. Like making a company that specializes investing of bitcoins
Any thoughts?

It's possible if the company focuses with bitcoin mining just like
genesis mining.Do you have anything in your perspective on what type of investment in bitcoin that a company should specialize?
Exchanges, casino's and bitcoin wallets as well.
Good question. As far as I know, aside from trading companies, such institutions exist though I could say that illegality issues may hinder the companies or businesses with this kind of purpose.