I wouldnt do that. It is generally a bad idea to invest for others because it can expose you to significant financial and legal risks. For example, if you make investment decisions on behalf of someone else and those decisions result in losses, the person for whom you are investing may hold you financially responsible for those losses.
You are the ones would really be that responsible and on the time that you had lost those investments then expect that they would really be ending up on blaming all on you even if you do make out some explanation
that this is a risky investment but still you had able to accept the deal and try out to handle their money despite of them which you had agreed on something.You know people do make out some expectations out from
you, which they are really expecting something positive and this is why i hate on handling out some funds came from other people.
Even if you are their family when it comes to money then relationships tends out to be broken once people do really see something bad with their money or investment.