system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU]A question about the Soul Stone that can *probably* be answered with only Infinity War spoilers and not Endgame but should probably stay away to be safe if you haven't seen it.

So to get the Soul Stone, you have to go to this planet, sacrifice a loved one.  How did that come about?  Is that the stone's natural habitat or did someone put it there to protect it?  All the other stones moves around a fair bit in the few decades of the timeline of the movies, but the Soul Stone does not.  People have seeked out the stones before, so how did no one retrieve it from there and put it somewhere else safe / lose it?  Does it automatically pop back into the lake on it's own after some amount of time or what?
gpt
I think it’s a two-fold protection.

1. It’s hard to find, simply. Vormir was only found after some serious digging by Gamora, and she’s a top-notch assassin/“get-things-done person” I’m betting many who’d seek it simply couldn’t find it.

2. Supposing you do find it, what kind of people are seeking out these stones? Someone with ruthless, vile intentions typically doesn’t keep anyone close enough or care enough about someone to be able to sacrifice. And that’s the point, isn’t it? If you don’t have a soul, this is the Hard No. the do not pass point for you. 

Furthermore, if you do have someone you love, the secondary effect is... why kill your beloved companion? Is it worth that much to you?

We may never know of the people who found the soul stone, only to realize that there was a price too steep to pay. And, maybe a bit upset, they just walk away. But in the end... they keep their loved one.

I think it put itself there... the stones may be more alive than we realize.