OK, but I heard darkcoin is private. Wouldn't that be better to use than bitcoin then?
Or will bitcoin start to use darkcoin technology to be private?
I think it is best for you to begin to do more research on both Bitcoin and Darkcoin before asking questions about being "private" (which is more commonly referred to as anonymity).
http://en.wikipedia.org/wiki/Bitcoinhttp://wiki.darkcoin.eu/wiki/Main_Page