i think in crypto currency, bitcoin don't have competitor but in other investment, gold is the heavy competitor because gold is use by the many of people which have money to buy gold. so bitcoin is still be the king in crypto currency and its never replace by another crypto currencies.
I agree to you, Bitcoin is the king of crypto currency and I dont think it will be replace by any crypto currency like you think. We cant compare gold and bitcoin as competitor because they are both different. Both gold and bitcoin is now very valuable that any one of us wants it.