Its worth looking at famous inventions and the eventual most profitable iteration of that technology. Definitely that could apply when BTC isnt copyrighted. I have zero belief in things like XRP but I do think there will be some part of industry which does the most to serve the most people, they are the ones who get the vast majority of profit from bringing crypto to the pockets of even people who have no ability to comprehend it.
There still is no remote control equivalent for BTC, it really has to be so easy people can have it without thinking in order to propagate I think or at least thats my view maybe some think its already easy enough. This $1m target isnt coming with zero advance from here, the world requires more then price
A teeny tiny % of the world's pop holds/uses any amount of bitcoin today. As adoption rates rise (and they are steadily rising since 2009 so why would this trend stop?) the price will rise. This will not be a linear rise, it will be an exponential rise. Why? because a huge amount of coins have either been lost or are being held by whales that aren't selling for fiat - ever. This is simple economics, you don't need an economics degree to understand that $1m/btc is not impossible, it is inevitable if bitcoin has long term success. It's either going to do it or totally fail, there isn't any in between with it due to the ever decreasing amount of new coins made and the steady increase of adoption. Satoshi said it himself - bitcoin will either be worth a hell of a lot in the future of nothing.