Almost,
That's a really neat coin by the way, goes really good with the notes. That depiction of a bird (or one very similar) is one of the watermarks on the notes right? You can't beat the price and first place to boot.
The most likely sets to have a chance at "worst of the best" are world countries, circulation issues (no proofs or precious metals), moderns and registries with only one participant. Also a minimum of one coin in the set. Using those criteria I started at the bottom with Zimbabwe and worked my way up, found a tie in Vatican City but found a new champ in Thailand and stopped.
Looks like it's going to be two years running.