What is the Bitcoin Blockchain ? Which Cryptocurrency wallet is the best?

What is the Bitcoin Blockchain ? Which Cryptocurrency wallet is the best?
The DigitalBank System guarantees secured lifetime access to you and the people you decide to share the account with , including heirs . User can  access their funds at any time, even years later. It doesn’t matter if device is lost or missing.
The DigitalBank device requires no technical skill at all. Impossible to lose funds due to user error.
The World’s Most Secured & Anonymous Banking Technology available , allowing Ultra Secured Financial Assets Transfer , Transactions and Custody
It’s almost impossible to attack the DB device because there are no ports,no backdoors , no keys . The Most Hard to penetrate banking system ever developed .
With the DigitalBank Vault Device , there is no third party involved , because we never store or know your private key , at any given time .  We are the Fort Knox of Cryptocurrency Transfers .