Also, a lot of people have mentioned that we need companies to pay their employees in BTC, and again we don't see much of this happening either. Again, where do most companies get their money to pay employees from? From investors. So, if they raised money originally in BTC, they'd be more inclined to pay employees in BTC.
This is very good point.
Also, value of BTC is not stable yet, like other, ''hard'' currencies like USD or EURO. No one wants to receive significantly less pay because the value of the currency fell compared to last month