Man you don't even have to be rich to see the change in people when you're suddenly doing better than... just move up a tax bracket or two and you'll see why some folks drop their family/friends once they make it.
Here's the thing most people don't get.. differences in mindsets magnify with more success.. If you're the only hustler/go getta in your circle and everyone else just discourages you or just sits on their ass all day.. if you do make it you're eventually gonna have to drop them, because they're gonna keep coming at you like

There's a difference between a nikka wanting you to teach him how to fish and a nikka that just wants you to keep giving him fish because you got a big ass fish farm.
You feed a sucker, he just grows to be a bigger leech.
Some of you saying you would never turn your back on fam are probably lucky to have good family around you.. Me personally, I couldn't, as my fam has always had my back, and me theirs.. really good people, we're really close knit and if I get put on I wouldn't even worry about myself, as long as they're set for life, I'm good.. On the flipside, I've witnessed family members ruin some of my friends' lives and they'd be a lot better off cutting off all contact with said fam.
Blood thicker than water? Only in certain cases
You need water to live, you learn that in the basics