There is probably some value in taxing unrealized stock gains. If you purchased Google stock via options at the IPO, and have still yet to sell it, it would be reasonable to consider a portion of that profit locked in, and somehow tax it. It would be complicated, and challenging, but leaving that stock entirely untaxed until it is sold or inherited incurs different problems.
It is not media companies creating clickbait headlines to induce outrage and get clicks. In this case, it is the President using taxpayer resources to mislead the public. While the former is problematic, the latter is far worse as it reduces trust in the whole system of governance.
Perhaps, but I can't think of any policy remedy that would prevent this. Leaders have made misleading statements to their people since time immemorial. It is incumbent on us to develop our critical thinking skills so we can call those leaders out on their misleading statements (as you are doing here), and allow that understanding to impact who we support and elevate to those positions of leadership.
It's not okay if someone lies or Miss leaves just because it furthers your sides political agenda