Today the museums were open and we purchased a 4-day pass. However, we decided to start it another day because there might be an larger crowd than normal since they were closed the previous days.
We got some pastries and spent the morning planning which museums to visit.
When we got back to the apartment, we researched more about pick pocketers. It's quite rampant in Paris and there's a lot of forums where people post their stories, stolen wallet, passports, etc... We were quite paranoid for the rest of our trip. I kept my bag even closer than usual and was suspicious of everyone, like they were all out to get me.