You can't assume it is tax fraud. It could also be money laundering or terrorist financing and it is why hive should not be supporting such an individual or project.
He literally admitted this to you and represents the community. That's not someone who should be leading a financial forum let alone a kitty cat club.
That is my point: what kind of stupid individual admits of having a annonymous account where he stashed some cash, and admits in public with multiple people. That makes no sense.
So here are the alternatives:
Stupid
Lie
I am going with the Lie.