When it comes to retro its not always about games with me. I'm still into retro things like vinyl records. Being from Gen X, I grew up with a combo of vinyl, tapes and CDs. Felt like a good evening to spin some Midnight Marauders from ATCQ.  While not cheap and will be hard to find after a while,  there are tons of vinyl albums being pressed today from the game world including a Final Fantasy set (music from all the games) from Square Enix. While not cheap these are almost guaranteed to gain value... possibly a better investment than stocks!  https://store.na.square-enix-games.com/en_US/product/694930/heroes-and-villains-select-tracks-from-the-final-fantasy-series-set-vinyl