Advising to invest in bitcoin is the right decision but your friend needs to know more about bitcoin before investing based on your words. Because the future of his company is involved with bitcoin investment, he must know the basic things of bitcoin by doing market research. Bitcoins are not static so if you see the price drop after investing you may be blamed. That's why your friend should know all the information about bitcoin market and then invest.
When we advise friends to invest in Bitcoin of course we have to be able to teach them about the investment until they understand it properly and don't let them not understand and invest of course this will be detrimental to them and after we suggest to them of course they will be able to make The choice of whether they can invest in Bitcoin or not of course really depends on their own choice and we should not force them in this matter. All we can do is suggest and give them a little understanding in this matter and the rest they can learn for themselves if they are really interested in investing.
Dont ever give any financial advice to anyone. If the advice turned into profitable, then they will praise you, but by chance , if it ends in loss, then they will be the one who will blame you. Hence you can give suggestions, but dont financially advise them. Its their own money, hence they should be responsible for where to invest or where to not. As a second person you should always avoid these types of situations.
Indeed, it would be better not to give advice regarding financial matters because as you said, if it works for them, of course they will praise it, but if it is not in accordance with what we expect, of course this will make us no longer have a good relationship with them, if we suggest it is indeed better because everyone has the right to manage their money according to their wishes and they must be able to be responsible for their financial decisions.