Oracle DB is really less and less popular. Oracle DBAs are worried. They know they are like COBOL devs.
Sure, if you're learning SQL or a technology to market yourself, Oracle DB might not be the best time investment. However, if you're already an expert in that, you shouldn't have trouble finding a role somewhere.
Doesn't look like it to me.
https://www.macrotrends.net/stocks/charts/ORCL/oracle/revenu...