Accont security

What's the best way to ensure you don't spend your OSGP on buying a account from Sythe and it getting recovored a month or two later? I understand simple answer is just dont buy and account from someone else, and to use a Trusted member, but does anything actually help to keep this from happening? Like the authenticator's or linking your account with Facebook? or GMAIL?

 

none of that stuff you mentioned will help. buy from someone you trust or dont buy at all