I just listened to Olaf Carlsen-Wee's YC podcast: https://blog.ycombinator.com/blockchain-investing-with-olaf-carlson-wee-and-aaron-harris/ and noticed especially the part where he said that cryptocurrencies are the deepest nightmare of many people in power disguised as get-rich-quick schemes. That got me thinking: I've been hearing about blockchain systems as information background noise for some time, but I do have a fair amount of spare computing power sitting around, so to speak. But which system should I install (or invest in, so to speak)?