It depends on what you want and how you feel about your investments and the money you put in it really. If you want a relatively safe bet, (if that even exists in investing) then you are better off sticking with gold as the prices are much more stable although it does offer a lower ROI than bitcoin would but if you can stomach the market and hope to make a lot of money, then bitcoin is your best bet.
Gold investment can't use small amount to get good profit. As far as I know, from my brother, he said a gold trader needs to has $50,000 for good profit every month. Of course, that amount isn't useful for those who are the poor want to change life from financial markets. But Bitcoin and cryptocurrency can help them do that with small money to investment and high ROI. However, as you said, high ROI = high risk. Nothing is free, you have to paid something first before get profit.