I'm new here, I've been using blockchain.info with Google authenticator also, would you say this is secure enough?
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That depends on how secure your password is.
If your password is "abc123", you will almost certainly lose your bitcoins to theft eventually.
If your password is "b678VvQ&*o78bvn2cv67^%@Ip59X#4x35Z", then it is probably secure enough.