Most standard E&O policies cover digital assets – when you obtain them via securities such as mutual funds and ETFs. And there’s plenty of opportunity to do that, with funds offered by Bitwise, Osprey and Grayscale, as well as Simplify, ProFunds and others. Lots of accredited funds are available, too, from Skybridge Capital, Pantera, Galaxy and more. There are also SMAs, such as Arbor Digital and Eaglebrook Advisors.
Buying bitcoin or other coins or tokens from exchanges like Coinbase or Gemini might not be covered by your E&O policy. But since you can’t manage assets for your clients in that way, I’m not sure why you’d want to.