The article mentions that they are targeting ETFs. As far as I know all of the ETFs are using custodians like Coinbase to store their funds, so they might not have the greatest success if they are trying to social engineer employees of BlackRock and Fidelity. Even if these schemes don’t always work as intended, eventually they will have success like we saw in the WazirX attack where North Korean hackers were able to steal $230 million.