This is perfect. And this does not only apply to Etherdelta. This applies to all trading sites. Every time you use an exchange platform, expect that there are always an integral risks involved. You should know and be aware all the time that the possibility that your coins are going to be hacked and siphoned off your wallet is always knocking at your door. This is so that when it finally comes, you will not be too shocked with what happened because you have known it all along.