I’m a big fan of Monero, ARK, and RaiBlocks. The latter allows for fast transactions (around 10s on average in my experience) by making each account responsible

I’m a big fan of Monero, ARK, and RaiBlocks. The latter allows for fast transactions (around 10s on average in my experience) by making each account responsible for managing their own blockchain (thus there’s no “mining” and crazy energy consumption) and it’s all connected over the network via a DAG data structure.