Investment is a personal business and you can force anyone to invest what he/she doesn't know about on how it works, first thing to do, if you talk to the person about cryptocurrency market, you explain briefly about Bitcoin on how it works in the ecosystem. Explain the trading expect and investment history of Bitcoin price movement for every circle and also let the person know that Bitcoin is a patient business, not to get rich quick, but to get rich is sure, if the person can follow the rules and being patient.