Well I had a similar experience. Two of my old bestfriends..and a few Taurus a knew. The best friends we knew each other since childhood. The pattern I notice... extremely insecure but humble then turn into this monster when they gain success. Then karma hit them they fall.. then the pattern start all over again. It's not only with money..it's relationship ,new friends, there new looks,and material things. Sadly a lot of them don't see themselves until they are tired of repeating patterns. I end long term friends over this..not just the bragging these friends turn into people I just didn't like. It's shocking how success can ruining a person. I talking about changing a person to the point you don't recognize them.