I don't use spreadsheets for acct management. If I did though, there's no way I'm storing all my stealth account credentials on a Google server somewhere.
If you're going to use Google I recommend you at least leave your passwords out of the spreadsheet. Store those on a flash drive under your mattress.
I'd store the passwords somewhere else that's safer (in case you do get hacked). Also put the relevant password for each account inside each user account, so it's there for when you need it.