I would check out https://en.bitcoin.it/wiki/Scalability https://en.bitcoin.it/wiki/Scalability . In the paper published by "Satoshi Nakamoto" he detailed a tec

I would check out https://en.bitcoin.it/wiki/Scalability https://en.bitcoin.it/wiki/Scalability . In the paper published by "Satoshi Nakamoto" he detailed a technique called pruning in which old transactions that can longer affect other transactions are drop from the blockchain