Very good questions. Any advice as to collectables is the obvious "buy low sell high". It is not predictable what someone will pay for a collectable. The gold and silver market are much different. For the silver strike, silver must get to $16.67/oz for them to be worth $10. So you must decide if you are a collector, a speculator, or an investor. Playing for silver strikes was what I did when I moved here thinking of profits in the selling. It seemed better than just losing money in machines. I liked to gamble. Too much competition for that. I got lucky a few times.
So are you a collector or a speculator? If the whole strike was brass, would you play for them? If you are concerned with the future of silver strikes, stick to Las Vegas, and they will always have value to someone.
My opinion only. Larry