There actually is. See, well, a whole lot of 15 USC Chapter 2B [0], notably provisions like 15 USC Sec. 78p (prohibiting certain trades by corporate insiders, and creating civil liability of those conducting such trades to the issuer of the security thus traded) and 78u-1 (authorizing civil penalties by the SEC for insider trading made illegal by the Securities and Exchange Act.)
What Bloomberg probably meant to say is that there is not a distinct crime of insider trading, but that illegal insider trading is generally also the crime of securities fraud.
https://www.justice.gov/usao-sdny/pr/former-employee-nft-mar...
The main problem with crypto is it forces us all to have to re-learn why fraud is bad, and in the process it allows those in power to arbitrage the fraud-learning itself. Satoshi explicitly remarks that fraud is a critical weakness of crypto. Regulations and laws might suck, but when so many societies have adopted anti-fraud mechanisms, hey maybe that was actually a good idea and not something we need to re-learn?
Even Roughgarden’s textbook proves the vulnerabilities of blockchain-based mechanisms.. .. Maybe crypto advocates citing false straw man arguments should be considered investment advice and punished by the SEC as well.