Why blockchains need two tiers

The second generation of blockchain networks are largely focused on increasing their transactions per second (TPS). The current limits of scalability were showcased on Ethereum, when the whole network ground to a near halt under the advance of the Crypto Kitties DApp. The required speed of transactions and the necessity of standardized charges for businesses to operate through blockchains means networks need to increase their ability to handle large numbers of transactions. The broadening implementations of blockchain, particularly smart contracts, also means that TPS must be increased.