If I had to choose, I would like my salary to be paid in bitcoins and if paid in fiat I would also definitely buy some bitcoins from my salary so the two complement each other.
the advantage is that i don't need to buy bitcoin if i get paid with bitcoin and only convert a small part of btcoin into fiat to meet my needs for one month and the rest i keep in my wallet and i will do it every month and my bitcoins will keep growing every month which will provide doubled profits when the price of bitcoin rises.
actually both are the same, in salary with bitcoin we will still convert some into fiat to meet the needs that do have to use fiat, and if paid with fiat we will also convert some into bitcoin for investment.