Did I say mandatory? I meant optional! You’re “free” to die in a cardboard box under a freeway as a market capitalist scarecrow warning to the other ants so they keep showing up to make us more!
The moment you use them as a collateral, they should be taxed as money.
You took a 10 billions loan with the actions you have as collateral? You pay taxes on these 10 billions.
Right now, the system is rigged because the richs get to transform their collateral into liquidity while paying 0 taxes on that, and they can even write off the interest on the interest incurred.