Hydroxychloroquine has been off-patent for decades and many companies manufacture it. There is no money in it in spite of what the OP alleges.
Nor did Trump or anyone "fire" the guy who just happens to have hired the same rotten lawyers that represented Blasey-Ford.
He is represented by the lawyers who represented Christine Blasey Ford, who testified against the nomination of Judge Brett M. Kavanaugh to the Supreme Court, accusing him of sexual misconduct decades ago, a claim he denied.
In a statement, the lawyers called Dr. Bright’s change in position “retaliation, plain and simple” and said they planned to ask for an investigation.
...
The medical publication Stat reported on Tuesday that Dr. Bright had clashed with Dr. Robert Kadlec, the assistant health secretary for preparedness and response. A former administration official disputed that Dr. Bright expressed significant opposition to the drug and insisted that he was moved out of his position because of longstanding concerns about his job performance.