Can anyone explain to me why should the market care about difficulty. Does it affect the product or is it just a mining problem. Does BTC get more secure each time the diff rises or is this all like one of those tractor pulls
http://www.youtube.com/watch?v=N8QTprCYgD8The higher the difficulty, the ASIC will generate less bitcoin for you.
The higher the difficulty (total network hashrate), it will be harder for someone to control >50% hashrate to launch a 51% attack.