Question

Why does all the altcoins go up/down along with bitcoin ,why cannot we compare it with USD/euro/GBP ?

Thats because they are all paired to Bitcoin (BTC/DASH) .. the more FIAT pairs a coin has (EUR/DASH & USD/DASH & OTC trading) , the more independent
a coin gets from Bitcoin.
Then tell me how the hell will Dash compete Btc while is 100% depended on it??why do dash devs repeat that dash is better or will surpass btc while there is not any signs of that.