So much nonsense in one paragraph.
These 'blockchains' by no means can replace or compete with Bitcoin, because they destroy what Bitcoin offers: monetary sovereignty secured by massive hashing power.
First. This "massive hashing power" is controlled by few Chinese pools. Second. Who said they destroy what bitcoin offers?
Because what these 'blockchains' offer is a publicly auditable settlement ledger. Nothing more. They won't allow any kind of anonymity, they won't offer censorship-resistance secured by massive hashing power, they simply don't need it. Yes, Bitcoin is not perfect in that regard as well (chinese miners), but it's a lot better. These 'blockchains' are not designed to replace Bitcoin, they are designed to improve settlement mechanisms within traditional financial system.