[ALittleLight]

No, I mean that you don't leave evidence for a targeted inspection against you to find. i.e. You execute the hack cleanly, the inspection against you finds nothing, and all they are left with is your suspicious trade, which is suspicious, but not prosecutable.

[anonAndOn]

Before you're even under surveillance, you have to be perfect in leaving no fingerprints for XX years before/after and they only need you to screw up OPSEC once. Easy?

[ALittleLight]

You just have to leave no evidence of the hack that links to you, but you have to do that anyway to get away.

There's nothing to hide after the fact. Dump the burner computer you used for the hack when you're done and never log in to the accounts, VPNs and VPSs you used again.

That you have the money is an open and legal fact, so you don't have to conceal anything really.