Go for it, man! I think $30/oz is still not too bad. Inflation will keep heating up, its just a matter of time. Even if Putin loses the war for Ukraine, they will keep punishing him so oil prices stay high. He is not giving up easily, thats for sure.
Other metals also have potential of course. Lithium fpr example will also be a bomb, as its needed for the electric cars. But its not something you can easily buy and stack at home, so I dont know if laymen like us should get envolved in that kind of trade. Same goes for similar metals like copper, zinc, nickel ect.