Bluzelle [BLX] looks like a solid project with good long-term potential.

They are actually solving a real world case, in fact the problem is that blockchains like Ethereum are not designed for data storage and management; doing so would take up too much space and take too much time. Bluzelle is a decentralized, on-demand, immutable and scalable database service for dApps and is going to make data fields small and organized in structure and there is an option to manipulate that data: create, read, update, and delete.

That's very different from its competitors with the file storage coin like Storj, Filecoin, Sia