GOLD, because gold is forever.
What if something happens in the future that wipes out the entire btc currency system?? No one know about it.
People who hope BTC for forever will regret when they see a lot altcoin born rapidly. (it's like machine gun bullet, digitally)
Yes, many people are thinking that gold is always better than bitcoins. Gold has its own importance and trust among the people from the ages, it is also very popular. On other hand bitcoin is still struggling in many countries for the regulating and to recognize by the the government. It will take more time to earn that trust and became a popular among the people.
I do not want say something bad about bitcoin, because i am also buy, use and holding bitcoin.
But gold is more realistic than bitcoin.
Gold is a real stuff, you can hold it and trade it to all currencies around the world.
Gold is founded from real mining, from earth instead of bitcoin which founded from satoshi nakamoto.
Satoshi Nakamoto have a right to make bitcoin as much as they want. (although they say they will make limit just for 21million BTC only)
But it is digital, and they can add more limit if they not keep their promise.