Bitcoin will be a major player for a fairly long time, but the emergence of mega-miners has made the decentralization argument weaker. Also, the size of the chain at this point makes validation slow and costly. Satoshi Nakamoto was brilliant in creating BTC, but this, like many other first-gen technologies, will be displaced. ZYou can buy bitcoin now and it will participate in the next major bull run, but it's dominance will surely slip below 50% in this year and we will see BTC stagnate in See full review

The Cardano team has identified and is actively trying to overcome the gaps associated with Proof-of-work and proof-of-stake currencies. The primary issues they are solving for are scalability, interoperability, and decentralization. The team has the right vision in my opinion. Recent attacks on proof-of-work coins and the inherent unscalability of first-gen coins (BTC) are laying bare the drastic need for this new approach. Cardano is not the only project being built toward this goal, but tSee full review