why not both of them ? i think with saving 20-30% your profit/money to gold always be a good choice, they already have their own market that can'be ruined by any other thing, even bitcoin i think. Old people and traditional people that can't use technology still hard to believe bitcoin is really exist, but who knows ? we are the next generation of old people, we can teach the next generation

Thats true, i think people with less technological knowledge would certainly choose to invest in gold. With it then gold will continue to have investors. Besides gold I think will have a bright future too. See gold hard to find, and has a limit on the number
people are holding gold for a long time. it is a long long tradition, but now people are changing their mind and now they are giving more importance to such business where they have more chances of making money. and specially those people who know about bitcoin they like to invest money in bitcoin because they know the importance of bitcoin that bitcoin can give them a good profit that they even cannot expect from any other business even not from their day job.