A scammer looking to impersonate Mixy.Money could just as easily generate a vanity onion address with a similar prefix for their own domain. While it might look cool it doesn't do anything to prevent users from falling for a phishing scam. The best way to protect yourself would be to bookmark the official onion URL and only access the site from there.
I know but I proposed it with two meanings.
For the brand.
For phishing attacking prevention.
It is better for the brand and it gives some level of prevention against phishing attack on the domain name. Because scammers must have skills to create a vanity onion address.