Ahahaha you just put concrete to my statement, difficulty is another argument how easy was in first 2-3 years to mine 10mil bitcoins by small groups of people, when nobody knew about mining, only in 2012 people waked up and starting to mine. By that time, half of bitcoins where already mined, imagine what will happen if they decide today to sell 3mil bitcoin, where the price will go? And still they have another 7-8 milions of bitcoin mined for free almost.