Gold's price increases.
Bitcoin's price decreases.
in contrast to gold, which each year can go up but it can also go down
but important, price each year does not always go down
Bitcoin is still considered as new currency or commodity and do not have any solid base to decide on price but it only depends on demand and supply so its prices are quite volatile and it can move any direction quite fast. But gold has solid history of giving profits over the time and its prices will not move so fast so gold considered as better investment option for long time. I put my small portion money in bitcoin but most in gold.
What do you think bitcoin could be like gold?