Oracle has always been very open, if not in words then in practice, about how iffy your job security is. You need to learn and earn to the max while the opportunity is there and always have a Plan B for when the music stops. Very few people I worked with made it to retirement and they were excellent and high value earners in their positions.
Oracle can provide you with great financial and technical opportunities. You just have to pay attention and realize that your odds of lasting there for a long time are slim. Think of it along the lines of "The Scorpion and the Frog" fable.
An on point post from @unb+1hRipCox.