For me it is Ethereum - second generation blockchain that permits the utilization of savvy contract. It is the stage on which 30%(approx) of the best 100 crytpocurrencies depend on. Likewise, on the off chance that you need to take an interest in ICOs (Initial Coin Offerings), like IPOs, you need ETH. Awful adaptability at present, however this worry could be mitigated by the destined to be executed Sharding idea and its new PoS/PoW agreement calculation Casper.
Ethereum is been traded twice at much faster rate now than any other crytpocurrencies even Bitcoin and everything is all running on the Ethereum blockchain.
Ethereum is currently the working arrangement of crypto.