you can explain how good btc to them, how much profit they will get, only with their computer capital can produce a little btc and if they seriously do it then they produce big btc by following signature campaign. not at risk
convincing people to bitcoin is not easy, it all depends on how to explain it and the person who described it. because the way people think different .. if I personally, I simply explain with simple and more show what I've got from bitcoin and the results .. karen with such people will be tempted by seeing the facts of the results and I live explains what work I get from bitcoin ..