That's your own fault if it happens. There will ALWAYS be someone capable of taking your job ..... it's up to YOU to become as IRreplacable as possible. Be uniqe so no one can duplicate your style. there are TONS of great singers out there that would LOVE to do what we do for money, but have NO clue how to start. "K" is giving all these wanna-bees the fuel for their fires of passion.
That's why you must stay at the top of your game ..... keep up with the technology ...... keep your repertoire fresh ....... etc ...etc .....
MAKE yourself in demand.
Only you can control your destiny in this crazy business.