Someone I know retired from an executive role at a tech company and, in retirement, he got into doing a lot of angel investing. He mostly got out of it except for a few companies he especially believed in. He told me he would have done far better investing the money in a handful of large tech companies.

People think there are these high-return (after adjusting for risk) investment opportunities out there off limits to the plebes. And it's mostly not true. Sure you can get lucky. But over the past decade you could have made a lot of money on boring big company investments.