Epf withdrawal or keep

Hi - My previous employer used to deduct epf and current employer do not. I am with current employer for last 4 years. 

Q1: What are the benefits of keeping money in EPF account? Or should I just withdraw it? 

Q2: My current employer do not deduct EPF . Can I deposit myself? I have UAN which I got from previous employer 4 years ago?

Please note I can keep money in EPF account and not in any urgency of money. If there is any benefit of keep money in EPF than I will keep else I will withdraw amount.