Yes, there is a way. If you search enough, you can find APKs that are edited so you get infinite coins, or at least you get 999999 coins.
Problems with that:
Most of them also come with edited ****, line custom coins, custom Pous, custom stuff... that will freak you out.
Also, most of them are NOT updated. Some of them are even previous to the Bathroom update!!!
There are also TOOLS that will edit your Pou stuff without actually you uninstalling it, like CheatDroid or CheatCIH, but you need a rooted phone/tablet.