When a bubble bursts some industries will get hurt worse than others. Tech is really in just about all industries now and will be impacted but there are enough shortages that if you are good at your job in one industry you should be able to transition to another. The best things you can do to prepare for a bubble bursting is to have a financial cushion in case finding the next job takes some time and minimize your non-job related commitments. For example, if you think a bubble is coming make sure you can afford a pay cut if you do lose your job and have to take a lower paying one. Hold off on buying a house since if your region were hit hard it makes it more difficult to move to one that wasn't. Minimize your debt. Things like that.