* In the future sidechains are going to be used in a big way on Ethereum. Lower cost, higher transaction processing. All the cool shit is being developed on Ethereum right now because of a robust toolchain. Also, there are many infrastructure startups that are filling in technology gaps.

* Basic Attention Token (BAT) is another "internet money" contender because the user can earn it through viewing ads. No fiat onramp needed.

I haven't researched Nano but I would be interested to hear the trade-offs compared to Ethereum and Bitcoin.