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If you go this route, be sure to save your backup code that is provided at initial setup. If you don’t have this and your phone is lost or broken then you have no way to get these code settings back. While not as good as a yubikey, it's still better than sms two factor. The reason vpns are important for cryptocurrency users especially is that we use bitcoin to keep as much data hidden as possible. A virtual private network is simply a must for everyone today, but especially cryptocurrency users.