nothing. anyone can. right now its mostly inefficient to allocate cpus for mining. its just not worth it for them. as more bitcoins are mined they get harder

nothing. anyone can. right now its mostly inefficient to allocate cpus for mining. its just not worth it for them. as more bitcoins are mined they get harder to mine. http://news.ycombinator.com/item?id=2265491 http://news.ycombinator.com/item?id=2265491