Gold has been around for a long time so it has had time to make its mark on people. Bitcoin is "relatively" new compared to gold. Bitcoin is still trying to find its place in the world and that is why people have gold compared to Bitcoin.
Gold is traditional currency in the history it is use for trading goods and other materials. Gold is better than bitcoin, because gold exists in very long long time but coins exist year 2010 i think. The big difference is the price of bitcoin compare to gold. But gold has lot of resources compare to bitcoin.
Bitcoin started in 2009. Gold is good or the only thing which will hold the value correctly. Appreciation rate of gold is low. However in long term it has proven itself worthy of greatest value holder. Gold has best liquidity on planet earth. Thus danger of robbery is there. All most all countries and all most all people recognize the gold as trusted source. For me gold serves the purpose of anchor of ship. Just like anchor gives the stability to the ship, gold gives stability to the value stored in it.
Bitcoin is investment with great volatile nature. Thus great risk yielding greatest benefit. Till now this market is not seen its potential realization. There are lot of scope for the improvements. Its only nine years since this revolution has started. In long run anyone joining at this stage could become early adopters and rip greatest benefits. or simply get the fingers burnt a bit.
Bitcoin is like that roller coaster ride and it has proven itself over the period of time.