Pick up a skill that makes money rather than another tech stack. If you're capable of selling, planning, and implementing SEO strategies like, e.g., scalable content generation, you can charge triple what the "technical" skill involved would merit.
Also, I never imagined that SEO work would pay thrice (!!!!) technical skills. I should definitely look into this more. Are there any other non-technical skill that are in such demand? I am willing to learn anything, as long as it is interesting and there is scope for finding work.