The parent company became Thesis, a venture studio where we raised a $21M Series A, and have incubated a few more projects (Keep, tBTC, Saddle, Tally).
A friend's company, Wyre, was rejected. They ended up being acquired for 1.5B [1].
It would've been nice to do YC in 2013/14. From what I've heard from other founders, I'm not sure the value today is nearly so high.
[0] - https://foldapp.com [1] - https://www.wsj.com/articles/crypto-startup-wyre-being-acqui...