Are the coins hacked/cracked?
No, there is not coin hack, only with winning
did you make a bot to win the matches or did u manually play every game?
I am playing maually. I played more and now i am selling all my coins very cheap.
That's very hard to believe, as for it would have taken you hundreds of hours to start from the very beginning, earning 15 million coins does not happen overnight.
There are hacks which make the guideline longer, this can help to win tournaments easily and in that way, you can make lost of coins per day