If you keep driving it the car will turn into a pristine showroom quality car worth millions.
You'll notice smoke out of the exhaust in worst cases. Take the accordian hose off and feel for shaft play. Move it up and down and in and out. If you feel any movement then your bearings are starting to wear. If it rubs the housing then ou might as well replace it and hope no metal contaminated your engine.
Bad rings? Did you turn up the boost without supporting mods? lol. Run a compression check for the rings and possible BHG. Sometimes it's just the oil that gets through.
you never state the problem that you're having. Knowing when a turbo is out is to general of a question and can lead to many answers. But I see you mention something about oil in exhaust.......check valve covers, oil returned line and your cam positioning sensor.....