Blockchain is not about database change protection. It is all about database change validation. If you change a bit in the database, whole database will be invalid. And if you change a bit in longest chain whole blockchain network will fail.
- If you block longest chain, you can prevent whole transactions.
- Blockchain is an AI database. It helps to break security algorithms, an advanced AI can break the security algorithm by analyzing open and hashed data relation. With blockchain there is no long living security algorithm. Post-quantum algorithms may not solve this problem.
- Google is about to break Bitcoin and all blockchain projects using Quantum Cloud.
- Above vulnerabilities exist in PoW, PoS and PoA algorithms.
- Unfortunately almost all cryptocurrency projects are actually to sell unrequited numbers for dollars that you earn by working.
Don’t use standard Blockchain, develop better one and develop better security algorithms :)