Back in 2009, I was there, saw the release of Bitcoing on Slashdot news. I had a computer on 24/7 because I was working on my thesis. Minin on CPU was feasible. I thought it could be a cool experiment to have a bit, just for fun. I never bothered with the hassle of actually running the miner on those very first days with the CPU and electricity I had from my uni for free.