I cannot say what I'm working on because it will be downvoted. Only pointless gimmicks which do not compete with the tech oligopoly can get any traction nowadays.

If I make a really good AI coding platform which saves people hours compared to existing platforms and provides more security. The chance of success is 0 because it's competing with incumbents.

If I make an app which allows cats to order food and back massages from their owners, this has a high chance of success.