I would choose for them both because than you can make a lot more money in my opinion at the end.
Also the bitcoin is for a short term and the gold one for a long term because with gold it takes a while to make profit.
Yeah choosing both is the right thing to do at a moment, as bitcoin is not that popular and people don't have much faith in it, but as time will move we can find more investors investing their money in bitcoins.
Yes, and I think that people have already started to invest their money in bitcoins, things are changing fast and if people find bitcoin attractive they would surely invest their money into it.