Steem has already established itself as the number one blockchain that has scalable bandwidth through its dPoW.

If I may cite the Steem bluepaper:

Often bottlenecked by Proof-of-Work (PoW), many blockchains can’t scale beyond three transactions per second, which is a fraction of the world’s financial traffic. Steem needed far more scale and speed than that offered by PoW, and so a lesser known algorithm called Delegated Proof of Stake (DPoS) was leveraged to lay the foundation for a blockchain suited for billions of users.