

let “unrealized gains” be taxed if they were ever used as collateral for a loan.
This simply makes no sense as a concept. Collateral is something that you tell the one you’re borrowing from “you can have this if I fail to pay my loan back”. If the loan is repaid, literally nothing happens to the collateral, and it plays zero part in the actual transaction. There is zero non-arbitrary reason to tax an asset just because it was used as collateral.
Also, all home equity loans would fall under this definition, as well.





But collateral isn’t used as part of a transaction unless the loan is defaulted on.