Hi guys i just wanna know is there any risk free way to invest bitcoins so they guaranteed grow
It doesn't matter if interest is low but just want to know if there is some place or site in which we invest bitcoins and our bitcoins are secured and we get guaranteed interest(doesn't matter if low)
please help i am newbie in this

Yes there is a way to make interest on your bitcoins.
I don't think it's risk free as rarely anything is but if you think it's worth it, then give it a shot.