Yes, you can. 3.2MP is ample and Canon is known for having the best Macro on the market. It's all about finding the closest distance at which the camera will focus on the coin (figure 10" to start), and getting the light right. You're not going to get *huge* pics, but nice clear 500px images aren't out of the question with 3.2 megapixels. What model is it?
The best thing about a bicycle is that it uses no gasoline, therefore the chance of fiery death is greatly reduced.
First Catman, then Gary Burke and now Bigg Fredd - there's one heck of a coin club in Heaven.