For all of you that seem confused, taxes are only on purchases and income. In that respect, bitcoin is already taxed in so much as it can be used to pay for someone's labor or purchase goods and services. The POTUS can't implement a tax on something because that item is "just hanging around".
Well as far as I know, when you convert your BTC to fiat, you will pay a tax due the increment of your capital... or at least that's the case in some countries. It sucks because like you said you already pay taxes when buying stuff, but there's another tax, the one I mentioned, when you increase your capital. That's why it would be ideal to work for BTC and buy with BTC, but if you want to buy a car or a house, you will need to pay taxes anyway since you can't hide that from the government.
I know there are some countries that have special "flat taxes" like the APT tax in Buenos Aires and the Spahn tax in Belgium. Those are different from the usual taxes Americans pay. They are also a form of transaction tax which requires a transaction to initiate the tax just as a purchase does in the USA.
The discussion was about Donald Trump's ability to tax the hell out of Bitcoin. Of course, as you know, Trump has no control over the taxation policies of other countries. In America, Bitcoin is already taxed when it's used for the purchase of goods and services or paying income. Trump does not need to take any action for Bitcoin to be taxed.
