It was my little dream to own 21 BTC and today i achieved it after hard work of so long time.Now i want to make my hard work pay me.I mean,i want that these bitcoins work for me someway and grow.Is there bitcoin bank that pays interest? What will you do with 21 BTC? How will you spend it? How will you grow it? Share anything you want that may help me to decide what should i do. 
if i own 21 btc then i will make a casino site to gamble for people everyone will come and loss his money . then i will grow my that 21 btc into 221 btc within year . but unfortunately i have no btc but still have a dream to make own casino .