Of course there is no risk free way to invest, if there was then everyone would do it and everyone would make money and no one would lose. Real life doesn't work like that, I don't know why people keep asking this type of question.
Dude there can be if someone professional who is good in trading we can invest in them or some legit site who gives loans to people we can invest in them..Get my point?
Many/most people who are really good at trading do not need clients, since it is much easier and more profitable to trade for yourself.
One legit exception would be someone who wants seed money for a larger trading fund, but the best traders can often find ways to do-it-themselves.
Even if you find a perfect situation with an honest person it is not risk free.then whats the way to increase our bitcoins or earn some bitcoins without invest?