i think of gold more as a premium lead. we’d for sure coat insides of cans with it, instead of tin if it was so cheap, but it’s weaker than steel. radiation shielding would be another one, ever heard of ancient lead used for radiation shielding for high sensitivity experiments? gold has none of these problems. gold ammunition, gold piping for chemical industry instead of nickel alloys, as long as it’s not too heavy. it would also cause all sorts of new problems with recycling