Haha I think it's a better question than it looks. Yes DGB (or any "modern" coin) has actually a greater chance at becoming a cash currency than the fat dinosaur bitcoin IMO. Forking BTC would be madness, not forking BTC means you have ridiculously slow transaction times and other technical restrictions.

About the point Cuban makes, however, that the central banks won't allow btc to succeed, I seriously wonder about their intentions, first, and their ability to bring real buisness out of the crypto market for second.

I'm not that knowldgreable of the subject but I wouldn't take the speculation of some dude too seriously, whoever "that dude" is. It's not like he's bound to put some thought behind his words.