I’ve pondered about a thing, and I hope some of you can enlighten me. The thing that sets Zcash apart from other currencies are the promise of shielded transactions. Without this, Zcash would just be another generic altcoin, right?
Now, Bitcoin was the first cryptocurrency, and has a lead in both usage and visibility in the media. I read somewhere that it is possible (or planned) that Bitcoin could implement encryption in its network to open up for real anonymous transactions (sorry, no source).
So my worried question is: Is there a possibility that one of the big currencies (BTC, ETH, LTC) can implement encryption changes that can compare with the shielded transactions of ZEC? Which in turn would make ZEC obsolete overnight?