I'm not disputing that -- What you didn't mention is that the entire free market economy is a human construct and therefore can't be compared to a single organism. The fact that humans alone among all the species on the planet have the capacity to create a "free-market economy" tells me that human ingenuity is not the result of a random process.
If you can find any evidence of monkeys in Africa buying and selling bananas on a futures market, I'll gladly concede the argument. Since you probably can't even imagine something as nonsensical as that (due to the inherent, permanent place that monkeys have as a form of life lower than humans), you'd have to say I've got a point.
All higher primates engage in peer group quid-pro-quo common pooling of various paired food resources, over long time frames, including human hunter-gatherers. Econometric demonstrations that this is a major, perhaps critical, survival trait abound. This not a hairsbreath different from buying and selling bananas on the futures market.