Bitcoin is a better medium of exchange than gold. It's trivially divisible, it can be checked against fraud and counterfeiting with a quick electronic test, and it can be sent around the world in minutes without the expenses usually associated with armed escort. If you're paying some random person in Venezuela a two or three figure sum, Bitcoin is better than gold, and probably more anonymous.

Gold is probably a better store of value than bitcoin. It's not a great one, mind you (the price is still too volatile). Its security can also be assured with physical protections that are easier for a layman to understand than bitcoin's electronic protections. Bitcoin has a small but nonzero chance of a total collapse in its value which gold will not face until widespread exploitation of asteroid-based mineral resources is commonplace.

Neither are effective units of account.

Nobody is pushing for vending machines or retailers to take gold...

Bitcoin is time delimited and finite whereas gold is finite. If major financial systems were to fail, the values of both would skyrocket, although bitcoin would make a better medium of exchange because of portability, in my opinion.