There is, but mostly this tournament is conducted by different centralised exchanges or some other altcoin project. With your topic, I have just scanned and searched through my notes to see if I can get a particular exchange that I am aware of conducting this trading tournament, but it seems I have deleted it already, and I can't remember the name of the exchange, but what you must know is that there are tournaments like this that exist and reward winners.
Have you at any point participated in any of these tournaments? I see some comments about KCJI and I'm really interested in participating in it since they also made provision for a demo account too. With this I believe I have nothing to lose if I participate.