How will you feel if after you try convincing people around you to consider investments especially in bitcoins and they end up investing in another thing not bitcoins?
In first place, I would not try to convince anybody in matters related to money, since it would backfire if investment fails and they'll hold me responsible for their loss.
But, if they ask me for recommendation, I would respond with the knowledge I have, thereon it's upto them whether to follow it or not. Also, I would be upfront about the fact that market is unpredictable and no one can guarantee anything, no matter how experienced one may be.
Regarding how would I feel, I don't and would not really care whether they follow my advise or not.
I agree with you, investment is something where there is always risk. As an investor, you should invest based on your own research. Because the investment is yours, you have to take the entire risk of this investment.
And as a consultant, always put yourself in the right place, you only advise him, but let him take the entire investment decision. Because you also do not know whether this investment will actually be successful or not. So where the matter is uncertain, you cannot force him to invest with false assumptions.
Do not give anyone 100% assurance, explain the risk to them well, and tell him that you have to take the entire risk of this investment. Then if he is able to take the risk, then he will invest, otherwise it is better to stay away from investment.