Workplace Rant....What to do?? Kinda Long...Sorry

The news was told to our area in the shop that I would be the new trainer for new hires and for anyone that wanted training on welding, fitting, blueprint reading, and other processes in the area.....then my boss said "possibly the whole shop" which surprised me, lol.
Supposed to get a pay increase, we'll see though.

be careful, you may be training your replacement. a raise is a good thing,
good for you and good for your boss, you get more money and your boss gets a low paid trainer. your skill is the only ammo you have, be careful who you share it with. it wouldn't be the first time someone unknowingly trained their replacement. watch your back.