Before the question, what if Bitcoin fails there is a need for a question will internet fail. With the world each and everything is connected to internet and happening through the internet. Once after the pandemic even the people who doesn't have much knowledge to use internet services have begun to make use of internet.
Yes, that is a very good question. And we all know very well that the Internet is never going to fail, the Internet is always there and it is part of our advancement. In our world today all of us are relying on the Internet for several things. Assuming that the Internet should go down around the world for a day, trust me there are so many things that would be disrupted.
There are so many things that we do on a daily which requires the Internet and the last thing that you would ever want to see is the Internet going down for any reason.
And we all know for sure that that will never happen. And as for Bitcoin, we all know that it is never going to end. Even if the government will ban it, people are still going to continue making use of bitcoin because it is decentralized and there are platforms that support that.