Finally, not everyone can get a bank account. If you lack the necessary minimum deposit to open the account or can't pay the maintenance fees, you will be denied access to essential financial services.
Now let's compare this to blockchain. Blockchains are completely decentralized, meaning that they cannot be frozen or shut down by any single authority. Further, blockchains are distributed across many thousands of computers all over the world. For a hacker to directly attack a blockchain, they would need to completely overwhelm the network with raw computing power.
Last but not least, since blockchains are permissionless, anyone can use them no matter their life circumstances. There are no accounts, there are no account fees, and there are no bankers to say no to you.
In short, a blockchain is a distributed collection of information that is highly resistant to hacking, cannot be shut down by any central authority, and records on a blockchain cannot be altered once they are placed onto it.