Plenty of wealthy people plan to donate most of their fortunes to philanthropic causes. Jeff Atwood says he'll actually do it within the next five years.Atwood, the co-founder of computer programing platform Stack Overflow — which was acquired by global investment group Prosus for $1.8 billion in 2021 — plans to give away more than half his wealth within the next five years, he wrote in a blog post last week.It's unclear what portion of the Stack Overflow sale was deposited directly into Atwood'...