Putting your blockchains into a single hash allows scaling of the blockchain and crypto to be almost exponential to where it could almost never end to how far could the chain scale.
I'm talking billions to yodas of transactions could be possible with blockchains per pool + sending all pool transactions into single hash.
You don't have to believe me, just take a look at this message inside a Self-Ledger Coin Hash (unreleased cryptocurrency):
076b9a715c25326cde4aefe1f45ae6f8x8ch
In the hash above contains 1 message, 1 send, 1 initial payout send, 2 confirmations of receiving, all Proofs from 1 blockchain. So 1 msg + 1 blockchain (1 initial send, 1 send, 2 confirms, all proofs)!
Video by 3D, posted by Deoblou Corp: