The situation with CryptoBonusMiles turns out to be interesting. Lets say I constantly fly with some airline company, I have a lot of bonuses, a good status, it doesnt make any sense to switch to a new one. And Im sure that many other people will have the same attitude towards this system.
If you are talking about CBM, it wont be necessary to switch to it. As far as I know, it positions itself as a bonus program aggregator. Thus, you can link your current bonus program to it and itll be more convenient to track points replenishment via the app. If you use several bonus programs, itll be even more convenient.