Bitcoin is becoming more and more common. But there are a lot of people who don't know Bitcoin. It's unreasonable to think that all of these people would buy bitcoins. I don't think that's gonna happen. However, more investors can enter the market than today's investors.
I also think so, that the usual knowledge about BTC is not enough. Although most people have heard about bitcoin, they do not know what its advantage is over the dollar. In addition, there is still a difficulty for many to make a payment, because it does not work like a credit card.