The most trustworthy sites i know and have been using myself for over a year now with good returns have been -> bit.do/EObot

You can mine over 20 different coins on there and really make a nice ROI , and all that with 1 miningpower.

and -> http://bit.do/mineflare

as they offer an amazing BTC-lifetime contract and nice ETH mining ,aswell as X11 and Zec.

good luck on your journey and stay away from scams ! 
for more info on crypto check this facebook site-> facebook.com/testyourinvest