Aakash Doshi is someone who saw January's "historic" rise in silver and gold prices as "unsustainable," calling the recent pullback one that was much needed. That said, he sees gold as a dip-buying opportunity after markets stabilized. Tom Graff is more concerned that a bubble formed in silver, arguing investors don't fully understand why they're invested. He offers a bull case for gold after it's plunge on Trump's Fed Chair nomination of Kevin Warsh.