There's a probability that he sold
shahinurit to someone, hacked, or might be banned.
I've investigated their post history and you might be wanted to check this out:
shahinurit last post was
https://bitcointalk.org/index.php?topic=3255629.msg34160607#msg34160607 and it's on April 07, 2018, 03:44:46 PM (GMT+7)
While
kristinaj first post was
https://bitcointalk.org/index.php?topic=3375689.msg35655627#msg35655627 and it's on April 26, 2018, 05:00:33 PM (GMT+7)
My best guess about this, he changes his main account to
kristinaj and moves his fund from 0xef12152904a95f7af64f5fc56b976bf44e527b10 to 0x835191daead779955dd0c5241ceb3ab501c5067c because his old account was banned. Any thought?