I have read that ether is fuel and btc is money, but i don't understand philosophy behind this.
What a coin offers that ether does not?
Maybe the answer is that ethereum network benefits more from a cheaper ethr than an expensive one.
Does one of the targets of any forks is to lower fuel price to attract more customers?
If the above are true, I should sell my investment as soon as possible.
In the case of Neo, they offer different concepts for share of network and fuel for it. But here ether is both. Which is better?
In past months I have seen a rush into simulating coin behaviors by smart contracts. The result is different coin tokens on Ethereum. Some are:
ebtc, ecash, ieth, postoken, basic income, ....
Creators claim that these are more secure + cheaper + faster than classic block-chain base ones.
Don't you think that these creatures are going to dominate classic ones because of better properties?
The question is more what other coins does that ETH doesn't....
Seriously, ETH can be use as a simple mean of payment or store of value just like BTC does. But ETH (the network) goes way beyond being a simple cryptocurrency: it aims to be an universal, decentralized computer where you can do whatever you want (if it can be coded of course...).
One of the main use of this computer (for now on at least) is to create smart contracts fueled by their own cryptotokens: the (in)famous ERC20 tokens. It's something in between sidechains and colored coins with BTC but with a more convenient and powerful way to develop things on it. This conveniency and standardization is the reason why many projects are blooming on ETH network and much faster than on BTC blockchain (even if this last one is much older).
But no, ERC20 token won't overcome ETH because you'll still have to pay for using ETH computer by using some gas that you can buy only using ETH (the cryptocurrency). So even if one heck of a dApp comes out and its cryptotoken costs a billion, it will still needs ETH to run. It can be like Apple and Samsung in a way: an iPhone X costs 2 times the price of a Galaxy S8 but Apple needs Samsung hardware to run.
NEO is interesting because it's Chinese which is a good (maybe the only - hello China's ban on ICOs!) way to talk to a quarter of humans being. But IMHO it's its only real quality: you can do everything NEO does with ETH, and so much more.