I recommend some altcoins:
BitShare - an open-source and decentralized exchange with a lot of possibilities. It has a lot of unique and helpful features. It provides more stable services than the other cryptocurrencies. You can also exchange various crypto coins with BitShares.
The StreamrDATAcoin - made for delivering data to applications. It uses an advanced technology and treated as the backbone of the global supercomputers. The technology allows the users to use and sell easily using the DATAcoin token.
The Siacoin - developed by the cloud storage company Sia. They provide various services like bandwidth, cloud storage, etc. with Siacoin. They are very strict about the security and store the data in various locations.