now you are saying blockchain is not innovative, cause blockchain is nothing new, it exists since around 1991

The first blockchain was conceptualized by a person (or group of people) known as Satoshi Nakamoto in 2008.

which encryption techniques? i am pretty sure nothing on the blockchain is encrypted

Blocks hold batches of valid transactions that are hashed and encoded into a Merkle tree.[3] Each block includes the cryptographic hash of the prior block in the blockchain, linking the two.