Hardwallet is the most secure way of storing the coins, but it might not be convenient enough to use. That's why I would recommend MEW. I remember they has an attack not so long ago, but if you always make sure your private keys are in the safe place, the connection with the website is secure (green) and the name is exactly the one they state on their official page, your money is safe and at the same time you can store almost everything in one wallet as well as  have access from any part of the planet.