A little change of perspective, bitcoin is not created for universal acceptance rather it is the acceptance of bitcoin by everyone with it. I see there are many other challenges for bitcoin from the past to the present or in the future, but there doesn't seem to be any convincing.
Instead of a story where we try to express the complexity of the problem, let me describe the great opponent as "the sun", "the atomic bomb", "human cruelty",... It is possible to imagine many other things but perhaps similarly unnecessary to the journey we exist with bitcoin.
For the main time until we have to see any other development which can surpass bitcoin we can boldly say that there is no coin yet which have meet the requirements to take over bitcoin purpose, but one thing I believe is this just like no body believe or ever imagine there will ever be something called bitcoin back in the days before it’s creation that’s how we can also wake up one day and meet another great innovation.
we are in an innovative age new idea comes and we are entitled to good things so no one will come across what they compare and deem worthy of there investment and also to hold it that will not dive into it, let us also know that nothing is develop to last forever, Bitcoin is here to stay but we can’t say for sure how long it’s going to last.