Bitcoin is just like any casino or lottery - it is a tax on stupid people who fundamentally do not understand that this is a game they will lose. It is tax on low intelligence.
Tax?? Wow it's so funny, usually normal people think that bitcoin is one of ways to avoid tax. Come on mate, let's think positively, we can't judge bitcoin is same as casino or lottery because they are absolutely different. If you enter the market for trading while you don't have necessary skill for trading then you actually do a gambling, but if you buy bitcoin for long term investment then it's not a gambling but a smart way to invest money.