I think that payment for employees in the form of cryptocurrency would only happen in the future if there was massive widespread adoption. One reason I think this is because at the moment in most places cryptocurrency is not fully adopted into everyday life. Many major retailers do not accept cryptocurrency, and in most places you cannot pay for rent or other things like that with cryptocurrency.
So once you think about this, it wouldn't make too much sense to receive your entire paycheck in a cryptocurrency if you would have to swap some or most of it over into fiat to survive.