One of the biggest points, gold is unlimited! I'm sure that even hundreds of years later, gold mining will be active. But Bitcoin is limited! Moreover, although the price of gold seems to be determined in the market, it is in fact closely related to the Dollar price.
actually, similar to bitcoin, gold also has a limited supply because there is a finite amount of gold available on earth. so unless we find another planet and start mining gold there or find a way to chemically alter other materials into gold (alchemy!) you can not say gold is unlimited.
as for mining, hundreds of years later bitcoin mining will still be ongoing and the reward will be half of half of .....half.