Not investing into companies that are obviously either frauds or extremely incompetent is the investor's job. We don't need a lot of new regulation to make it harder for you to buy bridges from people you meet on the subway.
I guess we need more blockchain! But what business will have 100% of their relationships, contracts and transactions publicly visible?
I took the comments to mean they wanted something to stop this from occurring, and I don't think that works well, criminals are going to do what criminals do. You can prosecute afterwards, but you can't easily stop them before they do it, see Theranos, WireCard, Nikola etc etc.