Bitcoin, as the pioneer currency of them all will surely be able to maintain its position at the top as long as people keeps on believing and patronizing it. Bitcoin has already faced lots of trouble way back and we are all aware of that. It is very necessary that we look back at bitcoin's history so that we may know why and how it was able to stay as the leading cryptocurrency. In terms of being an official currency, bitcoin might have a hard time being on the top since not everyone is knowledgeable about it yet.
Undoubtedly it will continue for quite some time until Bitcoin is legalized worldwide and will be used in the status of international cryptocurrency as a means of payment, investment, and as a digital asset. Nevertheless, we must understand that it is Bitcoin that can replace fiat funds and save mankind from the states monopoly on creating inflation and devaluing the savings of each person.