Most importantly it taught me that big ideas are worth pursuing.  Even if their probability of success seems small.  It is worth trying to change the world and making it a better place.  Small groups of smart, motivated people can really make a difference!  3 years ago when I started learning about bitcoin, I was certain it would get shut down and would be killed in the crib... Absolutely amazing where we are now!

Making me lots of BTCBTCBTC was a nice plus as well