The account value may fluctuate according to the different values of Steem.
While the idea is to blog, comment and participate, it is important to know the mechanics as well. When I was new I made it a point to search for information, most of which is on Steemit itself(where else!).
Whenever you are in doubt or need more information on any aspect of Steemit, use the search function on top using relevant keywords e.g. "account value" using the example in your post.
Thank you.