This is likely her final hurrah to try to get her name in history as the first female president. Otherwise, she ends up as a footnote in the also-ran category, similar to Geraldine Ferraro.
All Clinton cares about is getting through election night. For her, a legacy of being elected the first female president is more important than even her health.
If she does lose, the loss could be so devastating that she might not make it to January 20.
None of the Clintons would hold public office, therefore no influence to peddle. Clinton Foundation donations would fall off drastically. They might have to dip into their OWN money for retirement!
Also, if Trump wins, Pubbies take over the IRS, DOJ. FBI, etc. Team Clinton can no longer quash investigations into their multiple scandals. Might even be jail time involved here...