Tesla made piles of money but spent many years and $$ working on wireless lighting. We still don't have that today. He spent all he had with success and failures. In his later years he lived in a series of hotels and left a string of unpaid bills behind him.

Not on subject but he looked a lot like Groucho Marx but with a real mustache.
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“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell

It's not over when you lose. It's over when you quit.