Backup careers?

I am fully and happily employed right now, but I have still send out like 30-40 applications over the last few years. Just to see if I could get another data science job.
Over all those applications I only got 2 invitations total. I stand currently with 7 years (5 proper) of experience and a masters degree in mathematics and I don't have the feeling, that if I was fired today I could get another data science job within 6 …

applications backup careers data data science datascience experience job science