Ethereum with their application. They are working on scaling so they can catch up with VISA scalability. In that case, we could use it in, by many people, every day for payment without congestion. Privacy coins Monero, Zcash, Deeponion for hidden transactions. Some of the technical coins Golem which will be used to create a massive supercomputer from our home PCs. SONM, iExec, and Elastic are similar. One of the interesting coins out there is DATA coin by Streamr. They will use blockchain technology for transferring data, which could be sold. Data would be collected from everywhere. Cars, gas stations, buses etc.