I don't think it means much for Bitcoin or web3, but likely crypto will receive a boost in the form of giving Doge a real usage case. I imagine his everything app will be like Uber/DoorDash/Facebook/Robinhood/Tesla/(insert favorite news app here) all rolled in one. You'll be able to order food and trade stocks from the same app you use to get your news and make social media posts. You'll be able to see how many calories you've taken in and how much you've slept from the same app that calls your car to pick you up or monitor your home's electrical use. All of this will likely be done on a Tesla phone and who knows, maybe it'll be free with subsidies (for lower bandwidth model) and not have a monthly service fee because it runs on free satellites.
If that's his goal, then he is late to the party. Tencent already beat him years ago (WeChat does all those things and then some).
By 2030, I expect that the Tesla phone will be as popular as the iPhone.
I just see hype here. Steve Jobs solved a real problem in 2007 - make the phone a mini computer with easy input. Pi Phone doesn't innovate anything. In fact, no subsequent phone including newer iPhones have innovated anything.
Pi Phone's biggest (or should I say only) selling point is combining all of Musk's pet projects into one. At best it will crush all
Android phones, given that OS development is absolutely laborious and taking the usual "build many startups at a time" approach to operating systems will just make an engineering disaster, so he'll probably just reuse a re-skinned Android on that thing (so that people don't think it's actually Android).
Apple has too strong of a cult for a single corp to break through it, without their own army of followers - Musk doesn't have that of course, it's only applicable to companies, and all his companies are vying with each other for attention. It's possible you can be a Tesla fan but not a Neuralink or SpaceX fan. Your position would be one of indifference to them all, and also to Musk.
Competing against a single company is kind of like maintaining a war front - there's only so many fronts an army can hold at once, so attempting to compete against all these companies (including Apple) will not end well for his plans.