Clever idea, but currency doesn't stay long in circulation. Coins longer than bills -- the oldest bill in my wallet is from 2006, while I found a quarter from 1976 in my pocket. And if horcruces are as hard to destroy here as they are in canon, I imagine even Muggles would find it curious if a 50p coin were found intact after it should have been melted down.
I suppose it'd work if you're planning to keep supplies up on an ongoing basis and didn't think much of Muggle investigative abilities or their ability to interface with wizarding authorities, though -- and the latter does seem minimal in this universe.
How about the doorknob on the men's room in St. Paul's Cathedral? Or some other building you wouldn't expect to go away for a while. Or, heh, the Blarney Stone, if you can find enough time alone with it.
Both are withdrawn from circulation as they decay, and if they don't decay they'll stick around for a while. As it gets old enough, it'll get picked up by a collector of some sort, who will keep it better-preserved and think nothing of its long lifespan. (This does, however, limit the amount of possessing it can do)
Better idea: Door handles.
New long chapter! Since I expect its discussion to generate more than 160 comments (which would push the previous thread over the 500 comment limit) before the next chapter is posted, here is a new thread.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 108
(and chapter 109, once it comes out on Monday).EDIT: There have now been two separate calls for having one thread per chapter, along with a poll in this thread. If the poll in this thread indicates a majority preference for one thread per chapter by Monday, I will edit this post to make it for chapter 108 only. In that case a new thread for chapter 109 should be posted by whoever gets a chance and wants to after the chapter is released.
EDIT 2: The poll indicates a large majority (currently 78%) in favor of one thread per chapter. This post has been edited accordingly.
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: