I think that monero is indeed one of the potential coins for the future but I'm sure that monero will never be able to replace bitcoin. Bitcoin is too strong in the crypto currency. Bitcoin is deeply ingrained in the hearts of people so that bitcoin is difficult to replace with other coins. In my opinion, bitcoin will still be the king of crypto currency forever. Bitcoin has gained public trust and popularity which is very difficult to change so that these other coins are like only bitcoin followers whose prices and future depend on bitcoin. Not to replace bitcoin, including monero.