I recently changed my tune and agree with Stu's collecting idea. Everything $1 (in my case = and down) from Las Vegas.

I never realized how many chips I could be looking for and still have never ending fun.

Just getting a $1 from "every" Las Vegas casino would be a huge task. Starting with current and then moving to recent closures and obsoletes, could take years.

Then there are all those other chips from every place else to be collected along the way, just because they are nice looking.