No it's not possible because bitcoin is father of all cryptocurrency and when a new user hear about digital currency thrn bitcoin comes first. And you can see majority of the website accept bitcoin but not other coins. Abd also bitcoin is in top most position.
Yes bitcoin is the father,mother or boss of all other crypto-currency whatever you say.Just because of the success and popularity of bitcoin,all the other crypto-currency were created but no one can even compete with bitcoin,so replacing bitcoin just never can happen.