I think that gold could be good investment, gold standard is more reliable than fiat standard, but question will be, is that in favor for central banks and monetary system, I do not think so.
Gold for sure has always been a very good investment, but in the case where there is a possible or looming financial crisis, it is normal for investors to start pulling their funds into a trusted asset, which of course, considering the rate at which gold has been bullish kind of proves that. We all know what sets gold apart over the years is its ability to at least retain its value to some great extent irrespective of external factors.