Here is an article that lays out one of my main concerns of the past decade. Back when the markets tanked, the Fed began buying up those bad collateral debt obligations in stages and ended up with 4 TRILLION Dollars of bad junk on its books. As the article points out, other Central Banks were doing the same and globally they hold almost 15 TRILLION Dollars worth of bad debt.

This propped up the stock markets artificially for the big boom period that certainly helped me towards retirement, but what happens when that hyper pumping-up stops? We are probably about to find in the next year or two. I can only hope my portfolio (and my retirement) survives what is coming, because I have no idea how to protect it.

https://www.marketwatch.com/story/stock-market-investors-its-time-to-hear-the-ugly-truth-2019-01-05