You seems to not understand that there different types of blockchains. You can't compare bitcoin, ethereum and steem. They have different purpose. You can't use bitcoin to build applications on it and so on. Same way you can't use steem as store of value. Reason for this is that Bitcoin wasn't designed to allow anything else than transfer value. Steem can't do it. Steem blokchain wasn't design for it. Network won't be as secure and decentralized as Bitcoin. Also you can't use steem to build decentralized apps like Ethereum. And so on. It's really bad idea to compare this 3, becase they have really different purpose, capabilities and limitations.