> Homeowners get taxed every year on the value of their property. Let's do that to stocks, too.

Property tax is fairly regressive because everyone needs somewhere to live, property tax gets passed on as higher rents and living space generally scales sub-linearly with income. It's probably not something we should be emulating, especially if you're going to try to apply the same rules to small business owners.

> Homeowners get taxed every year on the value of their property

By the local municipality, not the federal or state government.

I think both stocks and homes should be taxed on realized value. If you sell it, that realizes the value, but also if you use it as collateral, that realizes the value. If you just live in it, we could say that it realizes the amount of rent you would have paid, or that it realizes nothing.