It is good to advice friends that are close to you to make investments on projects that have potentials,and before telling them about those projects,you must make research to know whether the money they will spend will not be a waste or not.It is always good to know all these to avoid having  problems with your friend,but if the person is not too close to you,it isn't good to advice them at all.Bitcoin has been so beneficial to people and it benefit alone should be seen by the friends who want to invest in it.Your financial growth should be the reason they want to make investments in Bitcoin.