This will only work if you can hire a trusted third party to escrow the funds of the bettor and you use your own money to make a bet. There's no assurance that you will release the funds to the bettor in case the bet won because you are both not binded on written agreement legally so you can easily delete your telegram and disappear when you are satisfied to the money you are holding. This is illegal same as match fixing because you are cheating on the bookies blind spot.