Those 3,028 people, or 0.000036% of the global population, hold more than 99% of all wealth.

The actual number is closer to 9% than 99%. This is probably some kind of mutation from "the combined wealth of billionaires is larger than the GDP of 99% of countries" where notably yearly income and wealth are not directly comparable.

Better (and true) things to say are "The global top 1% have more wealth than the bottom 95% combined" or "The richest 0.01% in the US have tripled their wealth in the last 30 years, while 90% of people have been treading water"

And since they run or influence our lives in so many ways, does that mean that humanity has cancer?

Nah, they're a side effect. It's people with Cluster B personality disorders that are the cancer. You can't be a billionaire without having one.

They're the reason that true communism and socialism will never happen. They will corrupt any system.

Because they thought it was a rational goal when they turned millionaire (might have been born millionaire), and Elmo wants to be the first trillionaire