as you can see Bitcoin have undergone a fork this 2017
bitcoin have undergone other forks in other (previous) years too.
and now there will be another fork again for Bitcoin Gold..
that has little to do with bitcoin!
it is just a project using bitcoin's name, code and blockchain to create some ICO altcoin with a large amount of premine.
How sure are we that Bitcoin will perform its purpose,
bitcoin will "perform its purpose" for the foreseeable future.
or will another Token or coin come into the spotlight, maybe not now... but most probably on the year 2021?
what token?
first there needs to be something capable of replacing or competing with bitcoin then it replaces it!