I spam this every time I have a chance: create a better version of captchas. Something that detects bot traffic reliably, but at the same time it does it in a w

I spam this every time I have a chance: create a better version of captchas. Something that detects bot traffic reliably, but at the same time it does it in a way that's invisible for humans. I would pay money for it, would even consider investing, if you come up with a idea that can be patented. (If there is no patent, I would be still a paying customer)