Bronze-silver-gold and PLATINUM right? Well that is normally the case for the pricing as well, given that is has more application in the industry, Pt lindlar katalysator par example. However, current ratio platium/gold is around 0,65, wohoho that is undervaluated give, that this ratio is on average 1,5. Well do with it whatever you want but this is the buy of 2018 IMO.
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but In my opinion is falling so read with the necessary diligence.