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 you give me 21 btc then i will start trading in bulky deal . which will turn into a huge and bulk profit . i also purchase some altcoin with some of btc to get profit speedly .