“Sogar” is used for emphasis, as in “Even you should know this”.

“Gar” is a bit special. “Gar nichts/keine” means “nothing/none at all”.

“Gleich” is more commonly translated as “equal”.

You’re missing “Gerade”, which is also “even”, but only regarding integers.

Europeans can instantly transfer money between bank accounts.

The digital Euro is similar in this regard, but it cuts out the middle man, I.e. banks, PayPal and visa/MasterCard (along with their surcharges).

If implemented correctly (I’m not up to date on the technical aspects), it could be almost anonymous and private (just as cash is).