Have leviair , terrortop . Liked silver gadget and twin twister <| sep |> This is insane ! If exchange sites start to question their investors on their income source then who will turn towards them ? Or maybe some countries in which these sites are operating have formulated certain rules for them . In order to allow customers carry transactions from a particular country , these sites have to abide by the law prevailing in that region . Very recently , India has demonetized its high valued currency and asked its users to replace the old currency with new notes . Some black money holders might be thronging bitcoin sites to buy the digital currency in order to make the money white . In order to block all such users , coinbase might be using this new policy to filter down the users .