"The good feeling you got was only because silver ended up correcting heavily to below your purchase price, otherwise you would have felt like a fool if silver continued up to say, $100 before correcting to $50."
Did you notice he said he sold only a 1/3 of his equity position? That was a deliberate tactic on his part - if price continued up he had exposure to it. If it fell he had booked some capital+profits to recycle back into the sector if so desired.
This is a professional approach that keeps the money trickling in.