Blocking Crypto Sites

It just occurs to me that there is no category for Crypto-related sites in the Parental Controls tab. So how do you deal with these, aside from blocking them individually?

For context, an extended family members (a couple) got their Messenger compromised and have sent messages about a scam with a platform that should be considered a gambling site, but bypassed both the Parental Control and HaGeZi - Multi PRO++ blocklist. Google AI said that the platform is being marketed as a Crypto site hence the bypass.

I already added said site in the blocklist, but it seems there a bunch of variations, and probably, clones with different unrelated names.