With many new cryptocurrencies sprouting in the net, is it possible that bitcoin can be overtaken as a top digital currency in the future? Is ethereum or other well known cryptocurrencies can be a threat to bitcoin dominance?
I don't think so. Bitcoin has made the first move and it has received a great deal of support from the community. New people come to know about crypto currency through bitcoin. I think bitcoin will be the king and will dominate over all other altcoins. Bitcoin can't be replaced.
100%, it's not going to be an exciting race for bitcoin as it will remain the Usain Bolt of crypto and untouchable for a long time. Gulden vs Litecoin is where the real action is going to take place. (excluding anonymous coins and assets which has it's own race)