Wow, first clever topic on Genesis Mining! Good question! it depends on what will grow faster: difficulty or the price! Do your own research on the price prognosis. Difficulty increase you can already predict, but the speed of increase may also rise, as everybody is buying graphics cards now and Jerry Banfield vlogging about earning $200 a day with mining with 50 graphics cards.... So, it's up to you. To tell the truth, I am torturing myself with the same question...... :) Following you! Thanks for this question! Let's look what will other specialists say ;)