If you canβt tax billionaires and trillionaire because βits unrealized gains until they cash out,β then stop letting them leverage that wealth for loans, as collateral, or as equity.
If itβs not real enough to tax, it shouldnβt be real enough to leverage.
This is why we say the system is rigged in favor of the super wealthy. Abolish billionaires, tax them out of existence, protect working people.