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To be honost with everything becoming digital these days and every aspect of our lives has become related to internet, it has become impossible to live without it, and if the internet in its entierty goes down the whole world goes into chaos, so if you are conserned about if bitcoin will survive without internet than there are far more things and systems that you need to worry about going down and not surviving, and for that reason i don't think that we will see it going down any time soon, which means bitcoin is going to be here for a while.
the need for the internet is directly proportional to technological advances, the fast-paced and instant lifestyle of modern society really needs an internet connection. so, you can imagine what will happen if the internet connection is lost, there will be many wheels that cannot move, as well as all activities that depend on digital access, including cryptocurrencies and e-money.
That's why I always say that bitcoin or altcoins will be effective as a payment alternative that complements fiat. conventional systems remain the mainstay if there is no internet connection.