Oh come on there is no such thing as what currency you prefer for this month or that month. It usual takes months and a year for me to close the trades because it takes that much time for them to evolve into good price tag which I want to sell at. So you see its not just limited to a a month or so. I never saw crypto currency in that way because it can take up that much time to develop. Each month lots of crypto currencies change their ranking in the CMC and thus you cant rely or fix your order at one coin at all.