No. Not all insiders would necessarily be professionals as covering their tracks post crypto hack. They could just be someone who knew they had access to the keys and said "screw it my life is already horrible lets try this".
Another option is honestly an insider who got screwed (a lot of employees had a TONNE of money on FTX) selling the keys they knew of to someone else.
Another option is honestly an insider who got screwed (a lot of employees had a TONNE of money on FTX) selling the keys they knew of to someone else.