Protection Racket could be a valuable addition to a control or midrange deck that aims to disrupt opponents' game plans by forcing them to make difficult decisions about losing life or allowing you to gain card advantage
Metal cards are not legal to play in official Pokmon tournaments, as they are thicker and heavier than a real card, and would result in a marked deck
Being able to force opponents to tap down artifacts, creatures, or lands based on the number of fading counters on it was an important cog in slowing down aggro strategies at the time
I recommend starting with the video below
But, if youre a collector, there is an increased value on sealed Elite Trainer Boxes so if you do snag one, be sure to think about keeping it sealed as the prices are always increasing
Be very wary of the seller and completely avoid anyone without a lot of positive feedback and an older account