Articles like these make me wonder about one metric. What "percentage" do you need to be in (top 20%, top 50%, top 1%), in the US, to be confident in having a s

Articles like these make me wonder about one metric. What "percentage" do you need to be in (top 20%, top 50%, top 1%), in the US, to be confident in having a secure retirement? And how has that changed over the decades? Because when I see the top 20% as being described as making $112,000 or more, I don't see that as even close to feeling confident you'll have a secure retirement. Until that improves, I have a hard time criticizing a 20%-er or a 19%-er for having somewhat of an "every man for himself" attitude in getting ahead.