I don't know if it's relevant, but I found a list of most popular keywords here: http://www.wordstream.com/popular-keywords/

bitcoin,btc,mining

mining, dating, trading, selling, shoping

Dating,buy and sell stuff,internet,mining,exchange,

autumnal equinox, yogi berra, empire, kam chancellor, (the current month, day, and year)-update daily with a script. https://www.google.com/trends/hottrends

Maxwell, Party, Beer, Facebook, Google.

mobile data, Google Adwords, shipping, fee charges, data base

hardware, god, apple, love, porn

League, CSGO, Hearthstone, DOTA , Starcraft

online business, hacking, tor, bitcoin, online job

heath, pet, food, clothes, gold

best site is
http://www.wordstream.com/popular-keywords/

bitcoins

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