There's no question that gold prices are having a moment. But there's another metal doing even better.Silver is proving to be a metal worth watching even as all eyes are on gold. The iShares MSCI Global Silver & Metals Miners ETF (SLVP) is the top-performing actively traded sector fund this year, up 141.2%, says Morningstar Direct. That edges out even the No. 1 gold miner ETF, VanEck Junior Gold Miner ETF (GDXY), up 139.7%.But it's not just the miners' shares that are standing out. Silver is a champ on a co ...