Just playing, you are right. My PC has AMD with 8 core and graphic crd, it mined $0.01 (yes, a penny) in about a week but not practical as the entire system was pegged out mining at 26kH/s. Moved up to 2 nanofury mining at 4GH/s and now can make a penny in about 21 hours in a pool but still not practical as these run too hot to touch. See cost calculator online...need about TH/s for $50 to be reasonable.