The retraction came after The Guardian noticed that the numbers used in the paper didn't add up, so questioned the accuracy of the analysis. There has been no new information to say that hydroxychloroquine works or doesn't.
Do you really believe every conspiracy theory you read? Bill Gates has spent the last twenty years giving away his money ($36 billion so far).
Maybe try counter balance some of the tinfoil hat stuff with fact checking: https://www.politifact.com/factchecks/2020/may/14/facebook-posts/no-evidence-gates-foundation-will-profit-coronavir/ Even facebook marked the story about Bill profiting from a vaccine as fake news..