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.

1) this is not the market. It’s just blockchain txns.

2) trust me when I say, no one in crypto except some very very select exchanges actually know how to make a market trading software. They think they can compete with NYSE which is large and employs such incredible talent that it still survives in a really tough industry. They’re likely closer to my grad school project, which even I can tell you, sucked absolute balls.

They may not have been involved in the operations of how to run the software/make the trades/interface, who knows they could just be a physical security person that realized there was an opportunity in the chaos.

I haven't seen any public information that tells us who it might be, this is all guess work, but it really doesn't look like a professional operation like Lazarus Group

1. Not all the insiders are very skilled, as we can see from these things blowing up in expected ways.

2. Even if you ARE a skilled insider, you may have no experience with laundering coin.

3. The biggest/best coin launderer was killed (tornado?) recently, so you may have to learn everything again.

4. You may be an expert with a gun to your head in some basement in God knows where, and trying to not be shot.

Not well!