So If Silver Goes To 100$ Which Coins Would You Melt?

D'uh, I'd melt the sterling .925 to cast something spiffy...
But if you mean, selling to a melter for cash, then the lowest purity will go first as per Gresham's law, so the US War Nickels, then .500 fine, then .720, then .800, and hopefully it wouldn't become tempting enough to sell anything .835 because that alloy is useful too. Anything .900 would be very easy to sell so that would be tempting as well. I would probably use that cash to add to other collections or up my game to acquire some platinum.

Sorry, I should've read the first page before answering.
Clearly the $20 for $20 is a frontrunner.
Uhhhh, then any and all generic rounds and bars because I don't trust them as much as "government" bars and rounds.

I'm with Canadian_coins on this one. What goes around comes around.

I'd sell to be melted any Nclt with a Mintage over 25,000, as long as it wasn't worth more elsewhere. I use anything over 25 k because it would be great to own some nice low Mintage coins. Prior to 2007 too many RCM coins the mintages were 50-150 K and that just way too many. Even a 8k Mintage is large. I really don't understand why they mint a glut of the yearly silver dollar. It seems that the RCM just don't get it that a 5k Mintage is big enough, especially with the amount of different coins currently produced. They'd really make collectors happy by doing this. Hopefully when they get a new mint master the direction will change.

Silver at $100/oz would be an alarming economic indicator. At that point I'd be saving silver in preference to converting it to cash.

with Scissel who makes an excellent point. Silver shooting up to $100 could be a precursor of a Weimar style currency collapse, and as that accelerated, you'd definitely wish you had your silver back rather than a wad of increasingly worthless paper.

I would not have ANY of them melted.
All coins with some bullion value also have a premium above bullion value, irrespective of the current spot silver price, whatever that may be. It's just that with a higher silver spot price, the percentage premium above bullion value would be less.

A small number of the silver coins in my collection may migrate to my 'junk silver' accumulation, but the great majority of them would remain in the main numismatic body of my collection.

With higher silver spot prices, coins that are more common, or are in poorer condition, preferentially find their way to the melting pot. That seems to be a fact of life.

I am first and foremost a numismatic collector, not a bullion silver collector. That will influence the character of the respondence to the question posed in this thread.