Here is the vision:
This planet is increasingly becoming a smaller place thanks to innovations in transportation and the interwebs. This should be obvious to you on the interwebs front.. all you have to do is look at who we have logged on the server. You can talk to people from all over the planet real time. Just /msg (someone from russia, germany, poland etc...) and start typing.
Thanks to current aviation we can get to the opposite side of the planet in less than a day via airplane assuming no horrible layovers.
This planet is getting exponentially smaller... Human beings across the globe are increasingly becoming closer connected.
In the not too distant future (probably 20-30 years from now) You will be able to get on a SpaceX commercial rocket (possibly other companies will enter the market as well by then), and go anywhere on planet earth in less than a couple hours. That's going to happen.... But even if you don't believe the rocket transportation replacing modern airplanes for long distance travel, you have to acknowledge that there will definitely be some sort of high speed high efficient mode of long distance transportation in the future... As long as human beings are alive, technology will advance. All of it. Including transportation.
It's inevitable that human beings will move towards globalization.. while probably still holding on to some aspects of nationalism.
That will happen. And because it will happen, there needs to be global forms of currency. Decentralized currency. Highly secure currency that people trust.
Unless you can think of something else, Crypto solves that problem.
The only question after that is which cryptos will be used for what.
I think it's safe to say bitcoin has solidified it's position as a global digital gold. I'll be honest i dont have a good understanding of Ethereum but based on what little i observe, that's here to stay also.. I honestly don't know what purpose it serves but I know it's not global fiat, and i admit i do need to look into it.
That leaves the big question: What will serve as a global digital fiat?
Right now, that seems to be doge coin for a multitude of reasons. Some super dumb/silly, but some fundamental as well.
A global fiat needs to be inflationary for the same reason national fiat currencies are. Partly stability and partly psychologically. Doge is the only "mainstream" crypto i know of that's inflationary... and unless some new groundbreaking idea for global digital fiat comes along, the mainstream idea is going to win almost every time.
So you can have whatever opinions you want about the people who are currently embracing these cryptos, but i'd say its not wise at all to base your opinion of the security off of who are endorsing it. Creating a connection between the fundamentals of the security and the people who currently hype it up is silly.