There have been a lot of other alt currencies, but don't seem to have what Bitcoin does. I think down the road potentially, but as of now the focus seems to be on how to make Bitcoin better, safer and more accessible. We're pretty bullish on it.
They can't be bitcoin if bitcoin will be died and it will never replace by other cryptocurrencies because i think that bitcoin is the father of all alternative coins if theres no bitcoin it will be worthless for those altcoins. Bitcoin is good and very expensive to be change 