A gamemaster's perspective
Putting a little cash in chests would be a great idea, save for some IC conciderations. Credits (the galaxy's primary means of exchange) are NOT actual cash. That is, theres no such thing as a 100-cred note in this gameworld, nor a quarter-cred coin. The Credit is a standard, =electronic= means of exchange, registered via galactic banks into individual accounts. I havent any clue what backs the Credit, on first glance you'd assume Notum, but the Credit has been in use for thousands of years before notum was discovered.
The way it works is that The Powers That Be (one can assume Omnitek, but that creates some continuity problems for the Clans. Perhaps the ICC?) have set credit bounties for all of the various fauna and flora on RK. Just touching a recently-killed carcass regesters the amount that critter was worth to your account. Im guessing this information transfer is a function of your NCU, but I havent any grounds for that assumption.
Gameworld-mechanics aside, I'd love to see cred in chests. I cant for the life of me figure out why someone would lock AND trap an empty chest... ;)