If it is for salary, then at this point I'll definitely go for $50,000. There are bills to pay, mortgage, insurance, etc...
2.
If it's for salary, that $50,000 you get will be taxed at roughly 65%, so you actually end up with $32,500.
If you take 100 bitcoins you won't pay tax until you convert to fiat. So even at the depressed current rate, 100 bitcoins would be worth $37,000. Not to mention the potential upside when we get out of this rut. With current laws, the only tax you pay on bitcoin is on your gains, as an investment, similar to capital gains. So if you kept for 1 year and didn't exchange for fiat, you would only pay 15% tax on your gain. It's pretty fuzzy, but in the end you would end up with a whole lot more if you took the bitcoins.
I guess it depends what country you reside in. What I stated is based on the United States (because OP phrased question in $, which I assumed to be USD). But if it's a country that has banned bitcoin use or criminalized it, then I would definitely take bitcoin, because in such country, the inflation of fiat would likely be so great that you would be losing a lot more going with the 50,000.
I suppose the logical choice depends on the tax rules of the country you live in. I heard some charge a level of capital gains tax on bitcoins that's way above their income tax level.