The ocean is not so wide or deep as to guarantee that the FBI treating it as a high-priority case wouldn't find correlation between evidence the hacker left on their Twitter attack and market motion. They have a lot of resources to invest, and are willing to spend more than the short-term value of money changing hands in the fraud.
The suspicion doesn't trigger until the twitter scam happens. Once the scam happens though then a huge amount of scrutiny is triggered on all of the TSLA market activity. Will you still be able to hide? Maybe. But the high profile nature of the Twitter scam guarantees that they will be looking for you.
It's an ocean of contracts out there.