I have a 2% cash back credit card that deposits a periodic amount in a Fidelity brokerage that I use just for messing around with interesting investing products (my actual retirement accounts are elsewhere). For religious reasons I don't really fuck with gambling or betting, so it scratches that particular itch. I only have mine invested in vaguely ESG and women-led index funds/ETFs/mutual funds and its 1Y returns beat the S&P 500 and DJIA by more than 10% lmao