Not "investing" in cryptocurrency would be a good start. =)
Apple takes a proactive stance towards apps that can even be used to access adult content. That's why Tumblr had a hard time.
Saying the mere ability to access adult content is very likely to get one shut down, but crypto wallets are fine, feels like a double standard
But have you thought of children? God forbid they give money to illegitimate scammers when legitimate one aren’t getting enough cash from legal gambling like loot boxes.