Bitcoins should actually be depicted as triangle, not circle, because triangle is the simplest geometric shape. Once combined then it can become a mass or shape: rectangle, circle, hexagon, etc. They can be of many sizes, thickness, and colors. The blockchain would actually be depicted as a 3D sphere/globe because all the transactions are intertwined. Hop to it.
To Eastfist,
The members of the Bitcoin Marketing team here at the Bitcoin Corporation want to congratulate you for coming up with such an unbelievably incredible and ingenious idea. It is now so obvious that a triangle would be so much better than a circle, yet it took a genius like you to figure it out. Your idea will spark a new resurgence in the adoption of Bitcoin by the public, and with this new symbol, Bitcoin shareholders are sure to see the value of their bitcoins go to the moon!
We are forever in your debt. We are not worthy!
Sincerely,
The Bitcoin Marketing Team