basically because the government is obviously against btc. main reason is that btc is so huge, one can say its a phenomena, that the govt sees it as a threat since they cant control it. second is because most of 'em are corrupt. they dont want everyone to prosper. as long as their pockets are full, they dont care. also, mentioning btc's volatility in a negative way is basically the same thing as attacking it. banks dont do it to warn, they do it to gain the people. to put dirt on btc's name. so what if its volatile and risky? when did they ever care about where people put their money?