I'd spend all of it on crypto and precious metals. I would only cash out a few thousand and start traveling the world, visit over a hundred countries and then stay to live somewhere nice and warm and without big government! After that I would probably just decide on the spot! Maybe make a business if I have a good idea.
With all the steem power(500,000 or even more)I would keep voting on steemit to grow the community. I would probably become an influencial figure in the cryptospace so I would also try to sponsor cool projects like EOS.