The money clip & chip were made to be given away to patrons of the Tropicana.
Most often, the reverse side of the chip does not have the printed inlay and is glued to the brass clip.

In recent months, 2 of these Tropicana $100 money clips have sold on eBay -- one for $20 and another for $8.
The more recent one is at:
http://cgi.ebay.com/Tropicana-Las-Vegas-Money-clip-/180529183496#ht_500wt_1147

It's an interesting memento to have, but not great monetary value.