Some good video on chloroquine because it's revelant: https://www.youtube.com/watch?v=ILowf7Tw7QY
I don't agree with Trump's call out that chloroquine is one of the possible coronavirus cures, in the spirit that a leader of a country must treat its populace as idiots they are, and if they get a notification of some cure, they will panic, compromise the supply of the drug (by buing it the **** out), die from overdosing (and this applies to every substance used as medicine and many others) or from ingesting something totally different and dangerous.
That said this looks like a good lead to me. The fact that some people are worthy of Darwin award here (self-medicine without any knowledge of proper treatment methods, doing so without any actual reason to other than panic, overdosing, and overdosing the wrong thing anyway) should not change the view on the research into it.
As for the research itself, I emphasise with the researchers. Surely the entire state of affairs in French healthcare system doesn't make attempting this research properly and with accordance with all the rules any easier. A good course of action would be to not drop chloroquine into the trash bin, but make sure we have properly conducted research on it with definitive and documented results, preferably as soon as possible.
Exempt from the video: on March 20th, the FDA approved chloroquine to be used, but only in hospitals. That is, places where a patient can be monitored for dangerous side effects.
As for the financial interest in chloroquine... Surely every single dollar Trump doesn't earn from this is worthy of any price, including thousands of dead.