Earning bitcoin as a salary depends on several issues. Is your employee ready to pay you in Bitcoins? At the same time, it also depends on whether the employer is ready to pay you in a dollar equivalent at the time of paying the salary. Otherwise, you might end up receiving peanuts when the price if bitcoin has gone down.
This is the thing must be consider when you intend to receive salary from your employer as you said they must willing to pay on dollar equivalent of Bitcoin because if they pay only on fixed Bitcoin value then. It would be very risky since your salary would depend on Bitcoin price.