How was you friend sure it was due to google hack? You can enable various 2FA and a strong password to protect yourself from most hacks.
As far as I know Google voice has concerns of privacy and not of being hacked.
Just maybe because he got locked out of his gmail and then suddenly his phone number stopped working...until his money was drained from his MEW wallet.
Very unlucky for him. Gotta be cautious.
yes correct mate thats why always remind to avoid this scenario do not share you privatekeys anyone need to take cre of your account check your account from time to to time, save your password in a different gadget to secured your privatekeys.