The Reuters headline and article are misleading. I was trying to help add context/some clarity based on what Bill actually said.
But seeing the multiple downvotes to my comment, it appears I may have miscommunicated. I am fallible, and only have 5 years experience as a professional bond trader so it's likely others on here have more experience and I welcome the chance to learn.
The headline makes it sound like markets have suddenly become a casino. That's not correct. The headline cuts off the rest of the sentence changing the meaning. The key point is markets have become a casino which are now using a Martingale-like system that is deceptively risky and intractable once started.
Hence he titled the letter "Doubling Down". Link to original: https://www.janus.com/insights/bill-gross-investment-outlook
Financial markets have always been a casino. Do people disagree with this? You bet money, make an educated guess about the future, if you are lucky and guess outcomes right you end up with more money. If you guess wrong you end up with less money. Win or lose you pay transaction costs (a rake, the vig, commission, spread, etc..)
Bill Gross has some great Investment Outlooks over the years still worth reading. Couple favorites:
"But let me admit something. There is not a Bond King or a Stock King or an Investor Sovereign alive that can claim title to a throne. All of us, even the old guys like Buffett, Soros, Fuss, yeah – me too, have cut our teeth during perhaps a most advantageous period of time, the most attractive epoch, that an investor could experience."
https://www.pimco.com/insights/economic-and-market-commentar...
https://www.pimco.com/insights/economic-and-market-commentar...
https://www.janus.com/insights/bill-gross-investment-outlook...