Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Is this investment opportunity problematic?
If you can separate the following two points, and live with them. I think you are good to go ahead. Otherwise I would seriously recommend you to reconsider.  Are you willing to give out this much money help a friend assuming that you will never get it back? This is what it means to give a gift, don't let their current intentions distract you from this. Will you be happy to wait as long as it takes till he is able and willing to give you some money? Is it ok if this moment never occurs, or would you feel like the money belongs to you already? This is what it means to receive the promise of a gift, don't get distracted by the fact that you may have given them something before. I don't have a legal background, but if you actually give the money to him so he can buy a house, without demanding something in return, I would judge that you are at least morally ok. (And if the transaction is in cash and fully deniable, you are probably not going to face legal problems in practice).