That might be really smart. Cobol is still in wide use, and somebody needs to replace the aging Cobol community. I bet salaries will sky rocket
They already have. You're entering a market, as you say, where every contemporary is a super senior developer, for old, rich companies like banks, and with demand staying static...but supply dropping.
I've read this multiple times, and I'm sure it's an intuive argument. Is it actually true though?
Yep, I am aware of projects currently looking for COBOL devs in Germany.
I am aware of projects which look for developer using any language. That doesn't make COBOL special though ^^