The full quote:

I gave all my Apple wealth away because wealth and power are not what I live for. I have a lot of fun and happiness. I funded a lot of important museums and arts groups in San Jose, the city of my birth, and they named a street after me for being good. I now speak publicly and have risen to the top. I have no idea how much I have but after speaking for 20 years it might be $10M plus a couple of homes. I never look for any type of tax dodge. I earn money from my labor and pay something like 55% combined tax on it. I am the happiest person ever. Life to me was never about accomplishment, but about Happiness, which is Smiles minus Frowns. I developed these philosophies when I was 18-20 years old and I never sold out.

The 120M aside, which is almost certainly pulled out of someone's ass, $120k/yr isn't that much. I'm sure that almost ever engineer at Apple makes more than that.

Steve Wozniak’s net worth is not definitively known,

They literally TOLD YOU THEY DON'T KNOW and you're still listening to their estimates as if they're fact.

but it is estimated to be around $100 million.

estimated BY WHO? AND HOW?