From the rankings you have now, I'm sure you have enough knowledge about bitcoin. And my suggestion is to buy bitcoin, gold is stable but gold is outdated.
I don't like to buy pure gold as in gold, because of their high value, but if jewelry gold I want to take a buy because after its been a long time the price of this is became high value,and if bitcoin I buy I want to buy to perfect time because I want to buy if bitcoin is low value when it comes the time bitcoin get a high value , I use it.