I'd like to say I was surprised to learn that President Trump has announced that he is taking hydroxychloroquine as a preventative measure against the coronavirus. But I'm not surprised at all. (Although many in his administration seem to have been.)
This is a president who appears to relish in his disdain for scientific and medical — not alternative — facts. The fact that medical masks have been proven to help prevent the spread of COVID-19 has done nothing to convince him to wear one — even when visiting essential working Americans at a mask factory. The fact that most reputable medical professionals say that there is no evidence hydroxychloroquine helps prevent contracting the virus means nothing to the president. The fact that most medical professionals say that the drug should only be used (in limited cases) in a hospital setting under strict supervision for patients who already have the virus also falls on the president's deaf ears.
Let's be honest. By stating that he is taking hydroxychloroquine to prevent contracting the virus — and not wearing a mask — Trump is campaigning. He's showing his supporters that he is too tough to wear a mask, but too special to concern himself with scientific fact.
So, in answer to his question "What have you got to lose?" the answer for some people is everything. Unless you happen to be the president of the United States who has access to the best medical care in the world.