UPDATE :

Thanks for all the responses so far! It is much appreciated.
Seems like Sunday shopping in Paris is not that good an idea! Have decided to take a flight in 1 day earlier, check in luggage to a CDG airport hotel and then do the shopping over Saturday and Sunday. Now the decision comes whether to take which option :

1. TGV train from CDG to Bruxelles-MIDI, change trains to a Thalys train and then from Bruxelles-MIDI on to Antwerp
2. Thalys direct from Gare Du Nord to Antwerp

What would you do, from a safety/security standpoint? On one hand, there is the security concern of taking the RER to Gare du Nord, the security concerns within the Gare du Nord terminal itself whilst changing trains. On the other hand, the other way would involve changing trains at Brussels and reading online it seems the Bruxelles-MIDI station is also a hotspot for crime and theft.

PS. I know, I know, I am completely paranoid, but after that pickpocketing incident in Paris 2 years back (which was a complete nightmare by the way) I just want to be as completely informed as possible. Even if it means to take a risk, I prefer to take a known, calculated risk.

Thanks in advance for the advice!