I've had the outline of a lightning talk in my head for a while. It goes like this:
Here are the significant tech advances of the last N years:
[jumble of logos]
And here are the successful tech startups of the last N years:
[more logos]
And here's the overlap:
[ Venn diagram showing almost none]
In your tech life, you contribute to something significant and you may get rich, but you won't do both.
Plan accordingly.