I don't understand how this guy got so much fame in the crypto world. He's an old school computer programmer. He's insane. And he Predicted bitcoin would go up? Well it was either going to go up or down. Predicting it going up doesn't it make you some crypto God.
It's as if I predicted it will rain tomorrow and if it does, calling myself a weatherman. Then, instead of lots of people checking the news for the weather they check my twitter. Its nuts.
I think you just answered your own questions in a way... he's an old school computer programmer with a lot of leverage with his name, whom people will recognize for at least two generations of computer users. He's insane and people love following insane characters. He predicted it like a lot of others, but he made it louder than most and also said he'd eat his dick, so that alone makes him more popular with people.
So yes, don't listen to him. But can't stop people from following personalities. If people cried for boy bands, why wouldn't they buy on the talkings of a madman?