I don't like this type of questions because it shows how weak you are, what makes you think that hearing peoples opinion will make any difference? I would have jump right into this if I believed that it would work out in the end.
It will make more sense feeding us the news after you've completely done it, not before even starting, some people can even discourage you and the truth about humans is they always feel like they know what's best for you.
They don't even know where they stand, they have doubts and fear, do not let their effects get the best of you, the fact is you don't need anyone's opinion, do it if you believe it will work out for you, people only know how to distract and stop plans, don't let people be the one to push you into anything you don't want to do.
It's not being weak, but more like building more confidence in his plans to invest his mother's money. Even if he has experience and knowledge about Bitcoin, the fact that the money to be invested in Bitcoin is coming from the profit earned in his mother's grocery store is not his money. Maybe he is having a mix of emotions about whether his plan will be good for his mother or not.
Though most of the previous posts say that it is good, and he knows that this plan will not be wasted, it is still a good idea to ask for other people's opinions who can also understand this kind of investment. It does not show weakness, it only means that you are open to receiving advice from other people that can help to increase your knowledge and know to yourself that you're not the only one who has this kind of mindset.