by accook
Yeah, it's hard to do much with coins, since they aren't tracked on the board. It would have to relate to a face-up card, or... turning in cards. What about:"When turning in cards for troops, add one coin to the total value."
And here's a financial liquidity version of Sahara's power, suitable for Khan Industries, LLC (I don't think this is strong enough for a starting power, but it might be interesting elsewhere):
"Turn in coins and place new troops any time during your turn."