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.
This is very much possible especially if bitcoin becomes more and more popular in the next few years. Just like with the stock market wherein hundreds of companies have provided services to the people for investing, this could also be done with bitcoin. They just need to create more awareness and make people trust bitcoin.
That is ok. Bitcoin that is known as digital currency or digital asset has the opportunity to be a type of profitable bussines like stock market, commodity market. If bitcoin is classified as commodity, it can be traded in commodity trading and that is the most possible one. Forex, gold, crude oil, have been accepted and traded in the world market and become an interesting and profitable business. Bitcoin will follow this and might be acceptable globally in near future.