DigitalCredit Pencil / Digital Credit Pencil

I propose a credit card in a form of a pencil.
As signing, the approval of a credit card is processed.
When using a credit card, the pen becomes shorter as the consumption reaches the limit.
In addition, the amount used is indicated through a display screen that is placed on the side of the pen.
This pencil type credit card stimulates our senses as we use a pencil type of analogue credit cards and can see the amount used through a digital screen.
With a built?in beam projector, users can choose to use one of many credit cards that they have and can check details of their consumption.