(I know many of you already know it but this incident I experienced made me so paranoid about using smartphones)
To start off, I'm not that deep into privacy rabbit hole but I do as much I can possibly to be private on my phone. But for the rest of phones in my family, I generally don't care because they are not tech savvy and pushing them towards privacy would make their lives hard.
So, the other day I pirated a movie for my family and since it was on Netflix, it was a direct rip with full HD. I was explaining to my family how this looks so good as this is an direct rip off from the Netflix platform, and not a recording of a screening in a cinema hall(camrip). It was a small 2min discussion in my native language with only English words used are record, piracy and Netflix.
Later I walk off and open YouTube, and I see a 2 recommendations pop-up on my homepage, "How to record Netflix shows" & "Why can't you screen record Netflix". THE WHAT NOW. I felt insanely insecure as I was sure never in my life I looked this shit up and it was purely based on those words I just spoke 5min back.
I am pretty secure on my device afaik and pretty sure all the listening happened on other devices in my family. Later that day, I went and saw which all apps had microphone access, moved most of them to Ask everytime and disabled Google app which literally has all the permissions enabled.
Overall a scary and saddening experience as this might be happening to almost everyone and made me feel it the journey I took to privacy-focused, all worth it.
This may be a simple coincidence. Maybe you had similar YouTube suggestions in the past but you didn't pay attention because they come at random times. Like if you drive a Honda Civic, you tend to spot all the Honda Civic in the street.
There would be an interesting experiment to make though:
The problem comes is the suggestion of travelling to destination X (in your case, the Bahamas) doesn't just pop up out of thin air - friends may have travelled there recently, perhaps there has been a recent advertising push, etc.
Another family member looking up some destinations to travel, then speaking with you later - same external IP of the home wifi being reported, bam you get advertised the destinations they looked at the most.
Choosing a "random" topic again also doesn't come out of thin air.