Your friend is saving money in the bank because it is his personal desire and he is satisfied even if he gets less profit from it. But you cannot give him financial advice that if he invests in Bitcoin he will get us profit and he should invest 40% of his savings. Because if he loses his hard earned money somehow he will blame you and you will be responsible for that. So refrain from giving financial advice to anyone. You can tell him about Bitcoin and of course you should also inform him well about the risks of Bitcoin investment.
Yes exactly you are right that we should tell a person that what is good and what is bad because everyone has their own decision and they can take care of their money in better way. Little or more but he is earning from bank and that's enough for him but if you tell him about the bitcoin and he doesn't get success then he will think wrong about you as he changes his thought because if you.
I think that its not matter that you are getting more or less profit but desiring for greater profit sometimes become risky and that's why individuals get deprived of their minimum profit too. bitcoin is good opportunity for profit but as compared to bank there is more risk involved in bitcoin.