It won't slab as any error, so you'll be throwing away your postage, submission fees, return postage, etc. And I assume you mean, by $5k, that you'll trade the coin for $5 worth of Krispy Kreme donuts.
Keep it as an example of extreme strike doubling. That's why we kept ours. That way, when you see it billed as a mint error, you'll know better.