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.
That's true, so it is cause if why is bitcoin making the world crazy because, it is so crazy to excitement earn lot of money and it is easiest way to get a good income and salary if you have no job o need a extra income. Many are crazy to invest using bitcoin because, even without doing anything we can earn lot money if the value of bitcoin is increase to increase.