This has always made me wonder "How and Why?" I wouldn't say I regularly get Deja Vu, but I do a few times a year and it really makes me question reality. They say your brain cannot imagine what you haven't seen or don't know, but I've had experiences that say otherwise.
The craziest one for me happened a couple years ago. I vividly remember the dream because it was very realistic. I was walking down a pathway near the water with my ladies family. There were vendors on both sides of us and everyone was trying on hats and such. I turned around and saw this large round church/tower and a few other older buildings. It looked like Europe, but no where that I knew of. My sister in law turned around with this odd looking straw hat and said "Hey check this one out" or something along those lines. The dream went further along and I was being chased for some reason. I ran into one of the buildings I saw and it had a spiral staircase all around the perimeter inside. That's about all I remember for a cliffsnotes.
About three months later we book a trip to Croatia. All I knew about Croatia was it was a country lol. No research, no pictures, nothing. The trip wasn't even my idea. Fast forward another 6 months and we arrive on vacation there. It was the second or third day, and Deja Vu struck. There I was, walking with her family, down this pathway towards the beach. I turned around and saw the same buildings that I saw in my dream. We walked a little further and my sister in law had that stupid hat on, saying "Hey check this one out."
I was basically awe-struck for a solid 30 seconds, then told them about my dream and how this is literally it up until this point. Idk, it blows my mind. I'd never looked this place up. No idea we would even be taking a vacation at the time. We'd never gone on vacation with her family, etc. Then it just happened exactly as I had seen it. Same buildings, same location, vendors on each side, and the same odd hat and phrase. We didn't go inside the building while we were there. I was curious though, so after we got back home I googled the name of the building that I saw. When I saw pictures of the inside, it was the same as I saw it in my dream. Trippy shit.
I understand your brain could make the connections if it's something you're familiar with. This is the exact opposite though, which really made me think about life, realities, and consciousness. It wasn't the first time and I'm sure it won't be the last.
I wouldn't mind some Deja Vu that would help me greater financially though, but that's not something you can plan. At the same time, it hasn't happened yet, so maybe that means it won't...