There are many cryptocurrencies out there, the fluctuation is wide and big. Theres a need of a coin that uses a process to stabilize its value.
No doubt that there is no other cryptocurrency or altcoin that can supersede the bitcoin. At least not for the next 5-10 years. Of course there are many rising competitors like Ethereum, ripple and litecoin.
Do you agree???
Future can't predict by people but we can assume what's going on in future so in my opinion btc can be replace by some coin that follows the popularity of bitcoin and that is ethereum not only ETH can replace btc as a king because many in altcoins now is good enough to be a top coins.