Bitcoin can still bring us huge profits, and this is the best coin in the world of crypto currency. Every year it gets stronger, so they believe that investing in bitcoin is very beneficial.
That is the purpose isnt it? The possibility of getting the worth of your investment replicated is something like a dream for many and Bitcoin is the way to make it come true.
This is the reason people still invest in Bitcoin however the only purpose is not the maximization of profit but also to minimize the cost of transaction that otherwise in normally high in case of making them via banks. This is why they think Bitcoin is a possible threat to the banking sector.