Not familiar with these, but assuming they are all alternative forms of blockchain-based money, I don't see how they can all survive. Really, only one should, because there is one internet. The reason we have multiple tangible currencies in the world is because the concept of money began when you had faith in the ruler to make good on it, and then you had fiat currencies tied to nation-states. But multiple currencies growing out of the same technology, available world-wide, its just a marketing gimmick as to which one earns enough credibility to have staying power.
An important distinction to make is understanding the difference between what's the blockchain, what's the token, and what tokens exist that aim to serve as digital currency. These terms are oftentimes conflated and misused, which is why the lay public has an oftentimes distorted view of what cryptocurrency.
A blockchain is a digital,
decentralized, and publicly verifiable ledger of all transactions that is continually growing overtime. I'd recommend reading the Satoshi Nakamoto White Paper on Bitcoin as a starting point to understand the fundamentals of cryptocurrency. Theoretically blockchains can be used to store any type of data which needs to be preserved and verified as authentic. This can be anything from real estate, to medical records, to cross-border financial transactions. The possibilities are literally endless, and this is why blockchain technology is commonly referred to as being in the same startup stage that the internet and world wide web was in the 1990s
The world wide web is a good example of a distributed network, where theoretically it's decentralized, as anyone on Earth can access the web, but it operates through a centralized model of client/server communication. VolNation exists on a centralized server that is constantly growing and changing with every new user and new message that's posted on this site.
Now if we had the VolNation blockchain, instead of utilizing a client/server model, the growth of the site would operate in a decentralized model. Instead of there being a master server and databse for VN, the VN blockchain would exists of a system of nodes where these nodes would "Mine" or process a series of complex cryptographic hashes (or "Blocks") to continue the growth of the site. As in the case of Bitcoin, anyone off the street who has a computer strong enough could in theory begin Mining transactions on the VN blockchain. As the site gets bigger and bigger, the size of the Blocks get larger and larger. It requires more energy and more computing power to process these hashes. This is where we're at with Bitcoin right now (and that's another more complex converastion). But in a nutshell, that's how blockchains operate in theory, and can be used for literally just about anything where digital transactions and information need to be verified.
Where we are at currently with blockchain technology, there are a number of limitations and problems when you look at the original Bitcoin blockchain. Namely the ability to scale and grow. In theory the Bitcoin block chain is fine for what it intends to be, a digital currency that exists in a decentralized model outside of the global international finance system that runs through centralized clearinghouses like central banks or payment authorization systems. Now what if I wanted to use a blockchain to store electronic health records? How about real estate deeds and titles? A system of free entertainment content? On demand videos like youtube? A network of longform web-based written content? Bitcoin's blockchain doesn't work for these kinds of projects because of the way it's constructed by design. Here's where Ehtereum comes in.
Like Bitcoin, Ethereum is a decentralized network where nodes process computational hashes to mine and verify transactions. Much like Bitcoin, Ethereum miners are rewarded with a token - in this case Ether (ETH). This is the incentive for miners to process transactions on the Ethereum blockchain. Now what's the major difference with Ethereum? Smart contracts.
Smart contracts exist as code on the Ethereum blockchain that can process literally any kind of transaction you can think of. Through smart contracts, you can develop a purpose specific blockchain for the development of whatever applications you can think of. Don't like YouTube's censorship? Go to D-Tube - blockchain powered videosharing. Don't like Medium's censorship? Go to SteemIt. These are just a couple of example of real world applications of Blockchain technology.
I hope this is helpful, and there is a ton of information out on the web, and Reddit is a great resource if you want to get into crypto.