IRS has been seeing bitcoin as a properly ever since 2014
https://www.irs.gov/newsroom/irs-virtual-currency-guidanceit is not really news and this above link is a lot better than using a link from some click bait site in my opinion

Do we really need to reveal how many bitcoins we have?
no we don't need to and we aren't but not all of us are using bitcoin as a currency. most people are trading bitcoin to make profit and when you make profit on a centralized exchange you also have to worry about taxes and then report it so that you are not evading them which is illegal.
in other words it comes down to your usage.