Betting of your own bitcoin asset is not an illegal,because thats is your own money  even it is in digital form,only the things become that illegall if that bitcoin you bet is coming from the other people that been victim of phishing or hacking,and you bet in gambling.definetly gambling is not illegal in my country if you have a permit coming from the government,and you pay taxes properly,but this betting of bitcoin is not illegal if its your currency,and you only do this for recreation and enjoyment for yourself.