I don't have any experience with the US tax system but where I live we have certain accounts that exclude private shares (and many other things). The main probl

I don't have any experience with the US tax system but where I live we have certain accounts that exclude private shares (and many other things). The main problem is valuing these shares correctly and if this can be done in an appropriate way I think it makes sense to not exclude them. For example... Private shares can be traded and are sometimes relatively liquid even though they're not public, in that case the trading price should be pretty representative of its real value.