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???
I personally believe proof-of-work was a great method to reach consensus for the first blockchain ever, but I don't really believe this is going to be the standard for the years to come. I believe proof of stake or similar consensus methods are going to prevail.