Because the world been converting to the modern world. On a day by day technology been changing and new things will finding. So, it means the current world going to the modern world. The BTC is a great solution to the modern world. This is not just a coin. We can get more benefits through BTC. There are have very fast and safe transaction method. It has a great technology side and its security system is very good. So these are the things why do we need BTC to the modern world.