You had mentioned that Eth is the fuel for the Eth Network, which made it sound like it was another quality of Eth that made it distinct from other crypto. My question was inquiring what then fuels the BTC network? It sounds like each crypto fuels itself via the earning incentive for helping secure the networks.Are you talking about other crypto currencies like BTC and LTC? All decentralized blockchain based networks need some form of security and reward for securing the network. Proof of Work (GPU/ASIC mining) or Proof of Stake are the two major methods of securing decentralized networks. BTC, LTC and ETH currently use Proof of Work consensus. ETH2.0 will use Proof of Stake consensus.