Will Our Collections Stand The Test Of Time?

No idea, I hope so

Maybe , if we put our collections in a vault and bury it 2000 feet beneath the surface that will sustain a thermo nuclear explosion then yes our coins might survive. the problem then will be; nobody left on earth to appreciate them even if found.
just love and cherish your coin collections now ; for tomorrow may never come !

My collection stands very little chance. These coins are not interesting to my wife. And the kids hold no sentimental value for anything, everything is either a tool for something practical or junk to be tossed. My collection is truly just me enjoying my life now, I've realized it holds no meaning beyond me and the now.

Gold coins have repeatedly been put into pots and buried with no additional protection, and 90% of the time they come out just fine, 100, 500, or 2,000 years later. Silver and bronze are pretty hardy, and could probably last 2,000-4,000 years in the right conditions.

As for the zinc and steel that we (the world as a whole) make our coins out of now? I highly doubt it. Just look at the average WWI-WWII coin made out of iron, steel, or zinc--most are ruined within a single human's life span. I don't think that even slabbing a MS-70 zincoln in a slab full of pure nitrogen would keep it from being a rotted, bubbly mess in 500 years.

I like to think my collection will still be around...but broken up in lots of different places. That is one of the fun things of coin collecting is to think about the history of the coin.

So I have a complete LWC collection. I hope they all stand the test of time-- but I hope they somehow dispersed (my wife will disperse of them in one fells swoop once I'm dead, haha, I am talking after that)...and fall into the hands of LOTS of collectors. So they won't survive the test of time in tact, but they will survive the test of time individually all over the place.

Or at least I hope

I intend to keep most of my collection in safe places regardless of Weather, wars, taxes, etc. However, if, for some reason my collection is not still intact in about 500 years, I'll let you know. Of course that would depend on if your still on this forum then.

Your question has two parts, which have different answers. "Will they survive?" is primarily a question of chemistry and physics. "Will any survivors still be valued" is primarily a sociological question.

As for survivability, it does depend on what the coin is made of. Coins of high purity gold will survive indefinitely, until and unless someone melts them down, because gold does not corrode, melt or evaporate under normal Earth-surface conditions; it's been said that if the dinosaurs had made gold coins, we'd be able to dig them up and they'd still look as good as new. Silver is almost as good, though will corrode eventually. Other alloys generally do not hold up very well over time, though some are worse than others. Coins made from pieces of dissimilar metals, sich as clad or plated coins, are least likely to survive for long periods as such objects are particularly prone to corrosion.

There is, of course, a social aspect to survivability. We've all seen on the news the fanatics of ISIS systematically destroying the pre-Islamic history of Iraq and Syria, and there's no telling whether or not a similarly fanatical revisionist regime of the future might take a disliking to the existence of your coins. In the excellent Alex Benedict novels by sci-fi author Jack McDevitt, set 20,000 years in the future, a totalitarian government on Earth in the 26th century had attempted to eradicate all of history and only two coins from the pre-3000 era were known to have survived: a Roman sestertius of emperor Nero and an American quarter from the 1990s.

Which leads to the second part of the question: will people want them? Part of the attraction of coins today is that they're an ancient invention that we still actually use in much the same way as the ancients did: we use coins to buy things. If people of the future still have a concept of "coins" in their everyday experience (ie they use them as money), then coin collecting will still be popular and your coins will be in high demand. If, on the other hand, coins have become as obsolete as swords and olive oil lamps, then only a tiny minority of history buffs and antiquarians will appreciate them.

This also assumes that the people in that future era are sufficiently "civilized" to have an appreciation for history. Another Jack McDevitt book, "Eternity Road", is set in post-apocalyptic North America; in one passage, some travellers scavenge the ruins of a bank, noticing but ignoring the piles of coins made from a mysterious yet totally useless and worthless alloy.