I'm not really familiar with the rules of Karate, but this seems like a fun thing to watch. Karate is the only martial arts I know that isn't really utilized in betting that much so this might not really sell to a lot of people.
Then again, it's a new venture, and anything new is welcome to the gambling space.
Karate is martial art that is actually quite popular in some areas, not everyone globally really likes it because there are very few official karate championships that really interest everyone.
Moreover, the ones that are really popular with karate are Japan and China, these two countries are countries that have lot of fighters with the martial art of karate in almost every region.
However, the spread of karate has really reached several countries, although it is not as popular as several other martial arts which have been successfully developed and fighters have become champions in major championships such as MMA and UFC.
In connection with this context, I think that this application could develop very rapidly if there were other collaborations that could create kind of hype and attract the interest of many people to use it.
Moreover, if this is really what the OP said about getting crypto tokens when using this application then it could attract more people.
But for betting, I hesitate to bet here because karate is not martial art that I like.