M14 Shooter
The Light of Truth
Amendment XVI:Depends how its set up.
A financial transaction tax could work just as well.
Unrealized gains is income if you need to pay tax on it.
The Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration.
A financial transaction tax is an excise on transactions, and does not tax wealth.
Unrealized gains aren't income.
So... No.