So should I go ahead and advise him to buy Bitcoin or I should leave him to come to me himself? Because he will buy it if I ask him to.
even what you are doing in action , still it is His decision to made up mate.
the best advise to give is "Let Him realize and Learn" so there is nothing or someone to blame when there is a a different side moves from His money.
some of my friends ask me the same question but what i did? sent them some links and videos for them to understand what is this market all about.
If you want to convince him to let him believe in bitcoin, then show him proof that you have made a profit on bitcoin. The proof is the only thing bitcoin skeptics need, they don't require you to explain at length when you have not yet made a return on your investment. Your friend has a lot of money, and if you are poorer than him, there is no reason for him to listen to you. Like me, I would recommend bitcoin to my boss, but he is richer than me, and I can't teach him to get rich. That is ridiculous.
there is nothing to convince mate , because this is their money and it is for them to win or lose.
Bitcoin is safe indeed but it is for long term mate and not for ASAP earning .