Thank you @pk, I think it is already a great help you provided me.
I understand that it could be taxed as a PFIC unless there are some exceptions.
Maybe it could also be considered as a foreign bank financial account in which case the interest would be taxed yearly in US (and then taxed in France if I go back to France).
I think at the end, you are right, and I should consider meeting with a tax professional.
Best regards and thanks for the information
