I know the article is dated by a year but I couldn’t help but find it highly amusing- mobile bitcoin mining apps that scam users. In the article it clearly states that mobile phones are unable to be bitcoin miners but, to the uninformed, it would seem like an easy means harvesting crytocurrency. The apps are designed to either use the victim as a zombie for mining their own currency or for pushing ads on the victim.
https://www.fortinet.com/blog/threat-research/a-mobile-bitcoin-miner–really-.html