How do you see bots market and in which type of bots are you interested in?

I would like to hear more specific opinions about bots (chatbots, AI, etc.). Especially I would like to hear opinions on which niches will provide a stable revenue for a bot developer.

I think bots can be super immensly useful if tied into some other service. (e.g.; The type I'm most interested in right now are Telegram bots and the ecosystem around it, because Telegram is probably the single most-used app on my phone and it pretty much runs my daily life.