It's better to encrypt your single wallet to prevent anyone from using it if he gets his hands on it, and than backup it in several places, including the cloud. My preferred backup is to email it to myself. Google will keep it safe forever, and it's easy to periodically email it again if you exceed the limit of unused keys, which will force the wallet to generate the new keys.
This post gave me cancer.
Please just start using Armory. It's better in every way than what you're doing.
Well, leaving your wallet in the cloud isnt much different that leaving it out in the street, and certainly removes any anonymity, but I think I might actually prefer that to an unencrypted cold wallet (which can be lost or stolen).
If the wallet is unencrypted, its the same as physical cash or gold, but without the instant fungibility. Armory is certainly one of the better solutions around. Common sense is another.