Aside bitcoin investment it is very wrong to force people to invest in any investment they don't want to since you won't bear the loss with them if any . however you can only advise them or guide them on the nature of the investment are introducing then. So it is left for them to decide whether to invest or not. I believe bitcoin has reached a stage where by people don't need to be forced to invest in it, rather they will be moved by what they have seen because people are mostly moved by result rather than action.