If you are working in Microsoft ERP then you need to know what is demand in technical area, nowadays Dynamics 365 FO is in demand but if you want to learn then you have expense money to get all those subscription .
If you learned technical then 3rd party integration things is in demand you can get project on this second demanding things is reporting , Power BI is best to provide report to your client because existing erp can not full fill all reporting demand of clients.
3rd things is in demand is database performance if you are expert in performance tuning then you are in demand. Rest will share in next post . Thanks.