Ask HN: What would you do if you cracked RSA encryption?

I was daydreaming about this the other day- there are alternatives to RSA, but I still think it underpins most Internet security. What would you do if you could economically crack it?

Sell the tech to a government? Write a paper? Keep it to yourself? Buy/sell a lot of stock? I don't know, so I figured it'd be fun to ask.