Being worried about very low or even negative real returns over the next 10-15 years (as has happened many times in the past, most recently 2000-2013) led me to start building sophisticated algorithmic trading models that can produce positive absolute returns in any market context in early 2020. While there have been ups and downs, I've turned 525k into 1.4M since deploying live in April 2020. I've recently decided to publish 7 of them at https://grizzlybulls.com, 3 totally free and 4 premium.