There are a lot of things that might happen in that 5 years run because there are assets that are very volatile just like bitcoin.

Being straightforward, Gold is much safer compared to bitcoin because gold is for a long term investments while bitcoin is for a short-term investments.

You need to make a lot of transactions with bitcoin when its price increases, you need to monitor the market to make bitcoin profitable. While in Gold, you just need patience, and wait for its price to increase as you wait for much longer time. It depends on you on which one will you choose, there are also other coins that can serve as an alternative coin to bitcoin.