No I don't think Gold will ever go down to 600$. The only chance of this happening would be if they find a new huge Gold mine with thousand of tons of Gold that could be mined easily. But this is very unlikely in my opinion. Sure BTC and ETH will take some of the investors away who are looking for a save asset to invest in. But there are still other players in the Gold market. Jewels will always need gold to make rings and other things, and in production we also need Gold, or some people like to have Gold teeth. This demand will probably keep Gold at higher levels.