The whole banking security system is a big farce. Consider, your credit/debit card PIN is usually a 4 digit number. In some cases it is 6 or 8 digits. Easy to remember.

Bitcoin is up to two 34 character sets of characters that are not made up of only numbers, but letters, as well. One set of characters is the address, and the other is like the PIN. Hard to remember, but millions of times as secure as cards. And the Bitcoin system can double the length of the character sets in an instant, on need or demand, making it trillions upon trillions of times as secure as cards.