Even if silver is anti-bacterial to a certain degree, having objects knocking against your feet in yer boots will be far worse than "reducing the stink". I'm getting blisters just from wearing normal boots, not to mention stuffing things inside of them.
(Random tidbit: if you're also hurting yourself while wearing boots, either get new boots, watch a video about how to properly knot your laces (I am serious), or get leukotape (athletic tape). I love that shit.)