Both Cardano and BNB use proof of stake, with Cardano being much more decentralized (but smart contracts are coming next few months), and BSC/BNB being the most

Both Cardano and BNB use proof of stake, with Cardano being much more decentralized (but smart contracts are coming next few months), and BSC/BNB being the most popular currently. You can also use BTC as a wrapped asset (backed by a smart contract) on both the BSC/Eth networks. PoW is going away quickly, but Bitcoin is not going to move, the "difficulty" is by design at least in the current concept of it as a storage of value. Edit: By the way, it is possible (or will be in the future) to run staking pools on Cardano on Raspberry Pis, and get the same benefits as bigger hardware. Currently it needs 4~8gb of ram afaik, but pis are getting faster every release, next one might be good.