New to the world of Bitcoin
Can I walk away from the table temporarily and come back in at a later time or date?


Sure you can. 

It isn't a perfect analogy, but think about bitcoin as if it were a dollar bill in your pocket. Some people will obtain a dollar bill, and then stash it away in a safe, not touching it for years. Others will take that dollar bill straight to the casino, keeping it on the table to bet and play with. 

There is no requirement to continuously buy/sell, bitcoin is not some sort of game. It is just an asset you can own, and do with as you see fit.