It's really risky to become a whistleblower and if you do, you better be able to live the rest of your life on your finances, because it might become very hard after becoming a whistleblower to receive another well-paying job. Also be prepared to deal with a lot of stress that might impact your health and mental wellbeing.
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If there is one thing that is pretty certain then it is that whistleblowers get to blow the whistle exactly once.
Trust your gut. When it says leave, leave. Even if others encourage the opposite. Even if your extended family depends on your income.
Make the effort to build and maintain a strong social circle. Filter for integrity. Assiduously avoid those who distort truth for personal advantage.
He tried to make it a full time job, it's not clear why but he took out loans to do it ... it just was a bad "business" choice.