I highly doubt that the SEC wouldn't put the required resources into this. After all, this would've caused tens of millions in damages, rather than the mediocre 100k$.
Also, you could filter for new traders and traders overly invested in TSLA. Giving the rather mediocre execution (i.e. single Bitcoin address), I doubt the attacker had a lot of time and capital upfront to hide in these masses.
Lastly, stock market transactions can be paused and are reversible - there's a good chance of a circuit breaker hitting or a reversal happening with that blatant market manipulation.
Also, you could filter for new traders and traders overly invested in TSLA. Giving the rather mediocre execution (i.e. single Bitcoin address), I doubt the attacker had a lot of time and capital upfront to hide in these masses.
Lastly, stock market transactions can be paused and are reversible - there's a good chance of a circuit breaker hitting or a reversal happening with that blatant market manipulation.