https://www.cryptocoinsnews.com/privacy-within-umbra/
This is the most important summary of the article:
Its built-in cryptocurrency, ShadowCash (SDC) — Finished!
Its private communication system — Finished!
Its fully decentralized marketplace — 92% Finished!
So 92 % of the fully decentralized marketplace is finished !!! Once it is ready, SDC's price could go up really fast.