I disagree. I believe that there are far far fewer silver coins than 16 billion. A LOT of silver has already been hoarded or melted. Nevertheless, I would still encourage new coin roll hunters. Like metal detecting, the hunt is what is fun, and any profit is just icing on the cake.

Whenever possible, I try to discourage the impression that coin roll hunters are greedy. To wit, I was at the bank recently doing a mostly non-CRHing transaction, during which I exchanged 18 halves for cash. My transaction was complicated, involving several accounts and CD's, and in the confusion, the teller gave me a dollar too much. I didn't realize I had an extra dollar until I got back to my car. hmm...it's only a dollar...she made the mistake, not me...sweet, free money. I tried to justify taking that dollar, but I just couldn't do it. I went back inside and gave it back. Turns out the teller realized her mistake right after I walked out the door. Later that day, I saw that same teller at the store, we talked, and ever since then, she's been very helpful setting aside coins for me. The moral of this story is pretty obvious, and I don't want to come off as self-righteous---I'm quite prone to seeking revenge on rude tellers by dumping halves on them---but I wanted to relate this story to encourage everyone not to get too greedy. As CRHers, we'll only be hurting ourselves if we create the impression that we're a greedy bunch. And fwiw, I'm not here to judge, and if you want to be a greedy, scrooge-like coin hunter, go for it! I do sympathize with that point of view, as well.
I have read several magazine articles that mention CRHing (in coin and treasure magazines), so consider that word is spreading! HH!