bitcoin double

i just bought some bitcion from my friend, and am a little confused the best way to invest it.. please i need some BTC guru to recommenced tasted and trusted way to invest with coin, so that i will get daily, weekly or monthly interest. i will appreciate, thanks in anticipation

a fiend of mine made a post on facebook that their is a secret website that can loan me btc to pay with 12% interest, but he refused to disclose the website url to me.. please is their any secret site that can loan you any amount of BTC with only 13% interest rate?.