First rule of the game don't save your funds on an exchange and that's because you don't control anything on an exchange, they own everything and can perform transaction like this cut and their won't be any receipt for it.
Although not related I don't think you should thinkuch about it now. If at 2015 you did not see over one Bitcoin as something that has prospects then I don't think you should now because even if that cut hadn't happened you may have spent the Bitcoin else where.