I think there is no need to use bitcoin on salary, it is more convenient if we used fiat because of it will not going to rise or maybe fall so we can.assure that the salary will be consistent. While if we use bitcoin we dont really know when the value drop or maybe rise so the.salary will no assurance to be consistent. so i beleive that using fiat is more advantage than using bitcoin in salary. However everyone can simply buy bitcoin after recieving a fiat salary It is all up to us.