E10 DB Size and Server Memory

if the DB is 60GB now and my server has 80GB with 68GB being used. Do I need to increase my memory? Working on a VM. 2.5 yrs ago, our DB was 15 GB.
I set a max of 60 GB on my SQL Server.

the most important thing is not to set the sql max to high as the server os needs ram to function properly. There is some benefit having your whole database in ram but you may not notice the difference.