With a more than a passing acknowledgment to the wisdom (or lack thereof) of ascribing generalized results to small samples I can say that all the people I know who I have observed to be successful sports gamblers and card players are lousy futures and options traders.
By lousy I mean lose everything in the account on one or two trades even when there may been one or more strings of previously successful trades.
I wondered why that was and if anything useful could be learned from their experience. One characteristic that seemed common was that the gamblers seem to overestimate the possibility of the gain from an option or futures trade while they tended to downplay or perhaps even ignore entirely the risk of loss.