Because its good to invest in bitcoin coz bitcoin value is high so people wants to invest in bitcoin and the world is talking about its value.
They go grazy of bitcoin because of what they heard or read on how there life change for a better . Everytime they talk about cryptocurrency ,the first thing they put in mind is Bitcoin. It has higher percentage of people who is been dreaming to have a better life and they see a way on how to do it by investing in bitcoin and they go crazy to learn it more about it.
I like this, and this is very true, most people expect to have a better life if investing in Bitcoin, and this I have experienced, when people around me who have seen the results I get from Bitcoin, then they invest in Bitcoin in hopes of getting a better life from Bitcoin...