Bitcoin will probably just end up laying the groundwork for whatever currencies succeed in the long run. It will probably always hold some value unless there is some major technical issue or attacks.
Well I definitely hold this sentiment lately, however, I am not so certain anything can dig into Bitcoin's mainstream momentum.
There are simply too many crypto choices and too many zealot communities to filter.
Every crypto has their magic tech, their super dev, their clever marketing, their awesome community, their fair launch, blah blah blah blah blah. It is a fun time to live in this wild west of digital money, but in the end picking a winner feels like heading to the track for the weekend. I doubt the actuall winner will have all of the attributes we may think you need to succeed.