For simply holding these coins in a wallet you generate dividends known as GAS. Check out
https://neotogas.com/ to see how much GAS you can generate. GAS today is worth $35 USD so not a bad dividend to receive. Also this is 'China's Ethereum' being highly scalable at 10,000 transactions per second!
Most of the altcoins transaction speed or more than bitcoin transaction that is reason many people recent dealing their transaction in ETH since the gas price is low in the market now. I see it is around 10 cents for the transaction.
To say about neo, it is not pretty much invested coin now. We will find the bitcoin grows again then will move back to the same condition and neo will be used and investors will fund on it.