I thank you all for your quick and helpful responses. For the record, I do restock my cache's periodically and I don't fully expect everyone to be of good honest nature. I understand that some people are for the taking, and others like myself are for the trading and more so for the thrill of the hunt. (I always like the excitement that goes with it. You can get some great stories doing this).
As for the TB and GC's, I put my coins out with the hope but not the expectation that they will survive. I'm glad to see at least one of my coins make it to New Zealand,....way beyond my expectations. As for the other I was only curious as to a time frame for marking it MIA. I'm not that concerned that it not show up anywhere, I'm sure if it got stolen or went missing, whom ever has it or finds it, will no doubt have a great story to go with it and enjoy it. After all, isn't that the point? I only asked because curiosity got the best of me.
Thanks again. Have a happy and safe holiday, and happy caching.