Explanation: This came from the original expression, "my two pennies worth." It has been shortened recently to just "my two cents." This is a way of offering your opinion and saying that is only worth two pennies. It can be seen as a humble way of giving your opinion because you are valuing it at only two cents, but that is not the case these days.
I don't agree with what's happening. That's just my two cents.
You didn't ask for my two cents but I'll tell you anyway.
Just to add my two cents, but I believe changing the design will be a better idea.
A.
So you don't think I should spend that much money on a car?
B.
You can spend whatever you want but that's my two cents.