1. Bitcoin comes to civilization at a very relevant time. The advent of space travel will make precious metals.... not precious. The concept of an asteroid containing 20 trillion dollars worth of resources (
http://mashable.com/2012/04/26/planetary-resources-asteroid-mining-trillions/ ) will just throw markets (as far as I understand markets). Cryptocurrencies have created something definitively precious. Furthermore, interplanetary markets are now possible.
2. No one talks about the influence of protocol consensus in the future of cryptocurrency. Why is this? This is cryptocurrency's saving grace regarding decentralization, for me, and the number one reason to run a full node - to run the version of the client you believe in. This is your vote. Your client makes the network. Implications of protocol consensus are far and wide. If a centralized power wields control of network hashrate and begins manipulating blockchain, if there are enough independent full nodes, they just install a new core designed to reject the manipulated blockchain branch. Doesn't matter how much hash the malevolent actor has - if your core doesn't accept the work, it won't be added.
Nation forks are possible. Imagine a future of global cryptocurrency usage, and economic turf wars start up - the protectionist, isoloationist zeal gets fired up in citizens of particular countries (for whatever reason - it happens, we're human, we're evolving, its ok) , and they modify their core. These separate blockchains continue until the disagreement is resolved. Can blockchain forks be merged, or would this be a permanent economic divide?
3. Is anyone talking about the decline in personal computers?
Are cryptocurrency networks of the future going to be run on servers or by a population of enthusiasts, and not your average Joe? I'm really looking forward to cryptocurrency banks (circle, coinbase, etc) investing in the infrastructure by developing and releasing Full Node Vaults - a little box you hardline into your router that munches on the blockchain. And then this gets to point 2, because these banks could then control these vaults (depending on the tech level of the user).
Elephants in the room.....
(edited for grammar and spelling)