Terra's CEO is a Korean or some other Asian citizen, so I don't think the SEC can do anything about what's going on. Most likely they can just stop any activity with that coin in the US, but no more than that. But the fact that this person has to answer for what happened is obvious. But it seems to me that either the investors will find him and cripple him, or nothing will happen at all.
If try to change new coin and smart contract address most lucky with the owner and developer, actually have news with Singapore come from by developer because have issues with police investigation after several investor report the owner. Better not try with some project have got scam and give the another chance, actually he will happy when getting second chance and try to scam you again. Left Luna coin coin and looking for other coins investing because have thousand trusted coin for investing except with Luna.