What has Wealth Done to the Life of Francisco d'Anconia?

Undoubtedly, Francisco d'Anconia is considered a powerful and wealthy man in Rand's plot. When Rand provides her readers with the childhood backgrounds of Dagny, Eddie, and Francisco, I understood how Francisco was able to become who he is at the end of chapter V. Since he was a kid he was already a genius, living through his moral of always doing something with a purpose. He works hard in everything he does and sets a goal for himself to increase the revenues of d'Anconia Copper by 100% as soon as he owns it. With a young teen having a such a deep understanding of the world and how different people work in the industry, I completely understood and respected Francisco's wealth and intelligence. However, when the news of his 15 million dollar loss at San Sebastián was delivered, and no logical reason for it was unravelled, I was left looking for the answer.
Rand provides the conversation between Dagny and Francisco at the end of chapter V which gives the reader a better understanding for the loss but not the answer. As I understood it, Francisco had so much money he could afford to lose 15 million dollars. He knew that he had many other businessmen, such as James Taggart and Orren Boyle, following his actions because they believed Francisco made no mistakes and always hit the jackpot. He invested in a failure at San Sebastián to prove to others that he is human. However, it resulted in the loss of money of all the other industries following him and many other secondary loses. Did he want to bring failure to everyone? Does he want to bring all these industries to bankruptcy? Who is John Galt?
Rand leaves her readers in a mystery regarding the actions of Francisco. His wealth changed him, and Francisco knew he would be changed by his money and even warned Dagny about it. Francisco's well-earned wealth brings him immense powers in the industry, and what he chooses to do with it is a concern for everyone. Rand's decision to keep withholding the secret Francisco refuses to tell Dagny is what makes me eager to read more. What has wealth done to the life of Francisco d'Anconia?