He has called every cryptocurrency except BTC a security before, so ALGO is not the only one. They have called DASH and a few other projects securities too in their lawsuit against bittrex.
The thing that makes ALGO special is that this guy used to be a fan of ALGO and introduce it as a high tech blockchain before:
https://twitter.com/Leerzeit/status/1459943962647711745Everything about this guy stinks horribly...