Update : I kindly got an answer from Member Peter Surda and he proposed me an AppImage that works perfectly.
So this would be the alternative for now I guess.
Additional question : Is there a command line or many so I can delete the packages dependencies that are not useful after having run the Wiki procedure? I just want a clean system as it is brand new
sudo apt-get install python openssl libssl-dev git python-msgpack python-qt4
git clone https://github.com/Bitmessage/PyBitmessage $HOME/PyBitmessage
Thanks for teaching me.