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.
Well technically speaking employees can't legally be paid purely in BTC, at least if they're hourly paid individuals. BTC is considered to be a commodity and as such wouldn't comply with the minimum wages laws should an hourly paid individual be paid entirely in BTC.