1. Similarly to many other people here, this is the first time I've heard that bitcoin is just a beta version, but I don't care about that at all. Whether it's official or beta, it's important to never put all your eggs in one basket like you say, even if bitcoin is better now, never put it all on one thing. There is no such thing as absolute in this world, everything can change at any time.
2. Satoshi was right about this, as no one can be sure what will happen in the future, but it is amazing that bitcoin is increasing in volume day by day and if we can maintain this for another 20 years, bitcoin's transaction volume will be monstrously large.