Do we came from the same country? Lol. Anyway, when i was a child I once hunt spiders every night (because we believe thag they're easier to catch during night time) on my province and match them up on the next day. Some of the naughty kids along my neighborhood play with involving money but I refuse to do such thing during those times because I'm a good boy and strictly follow parental advice. Ahh, the good old days!

Anyway, the use of crypto can be applied here if and only if will be only under the table transactions. I mean, it's like "if you win then give me your btc address and I'll send the payment, after that we're good". Online gambling? I don't think it will work because 1) there is no association who handle such kind of game thus we can still consider it as illegal 2) Animal welfare activists will get mad and say it's a form of animal cruelty 3) These insects are seasonal thus there would be a struggle for creating matches.