What do you hold the bulk of your wealth in?
your answer as it was said once before is diversification.
you first calculate the risks and rewards and their ratio for each investment and then decide which ones to choose. of course that is only if you have a considerable amount that you can buy considerable amount of each! for example you can't diversify with $500 it is not worth it!
but if you have more, then list all the things you can buy (gold, silver, stocks, fiats "USD, GBP,...", real estate,...) and then see how much risk is acceptable to you and then invest in those with future if the time is right.