I am pretty much sure that  accounts has been sold or hacked. Its quite reasonable to tag them since their post history with multiple languages. That means owner has been changed. Tagged from my side.

I am not agree to tag this person just because of posting quality and gap. My posting behaviour at the beginning of join and current posting behaviour isn't same. It doesn't mean my account has been sold. Yes, there is long time gap and change pass or email, but this not enough to destroy a account. Who know perhaps he didn't use forum, and now he like to use it since bitcoin proces higher then 5 years back.