Trump isn't trying to "question and challenge" the outcome, he's trying to overturn the results of the election by lying and deceit. He's doing this to PREVENT being arrested and tried for his numerous crimes committed both before and during his tenure as President.
Since Presidents are shielded from prosecution while in office, Trump was hoping to run out the Statute of Limitations on his crimes during his campaign and his first term, by being re-elected. Now he's committing more crimes (fraud) by continuing to fundraise off his lies.
Further crimes involving January 6th are coming to light, and while no past President has ever been prosecuted for crimes committed while in office, Donald Trump will very likely be the first.
In any case, Trump Corporation will lose it's liquor and gambling licenses the world over because of the prosecution of the company for tax evasion in New York. That'll be enough to bring Trump and his entire family, down financially.
If Trump dies broke, and hated throughout the world, that's good enough for me.