Not being negative but I don't think it will be the "major currency". Real talk, not everyone will have access to crypto even in the future. This "Crypto Dream" will not be acheived because we still have many issues about technology all around the world. Plus not everyone can afford one.
Yes but still, who knows? Maybe one day we wake up and we see bitcoin taking over all the other currencies on the world, everything is unpredictable.
More than two decades ago, no one thought that Euro was gonna be a currency (yes, it is a different example anyway)