We need Bitcoin because it is giving us a golden opportunity to earn an extra income online, and it is also growing up our savings for the emergency cases. Personally I need it too because it is essential for trading , and i make trades daily almost, and most exchangers support BTC mainly.
Some people depend from earning bitcoin which actually can change someone's life if take it seriously and work smartly. Those who can't find work in the industry can work in bitcoin without needing qualifications and just have knowledge about cryptocurrency. I am in this situation where only bitcoin I can work with and I need it because there is where I can gain and earn with my extra time.