this was about the $5 wrench not about the tracing of it, and sure you can know the origin but you don't know the final destination.

No it doesn't. If I go to an escrow company, transfer my ten million in bitcoin to their wallet and they put money into the bank, the only paper trail is the escrow company.

Escrow companies open and close all the time for this very reason. People wash money alllll day long with US real estate for this reason.