First, are you employed as a Basic?
If so, then I think it would be worth it, otherwise you would rapidly become unemployed.
Second, do you wish to prepare for worst case scenario?
Say you fail NR Medic a few times...or even one time, and he next test is not available for several months. Again, the same thing, you are unemployable as you do not have either level cert.
Finally, how difficult is it really to recert the card and not have to worry about any of the above? Pretty darn simple. If you are due for recert, you should have plenty of CMEs by now, certainly if you are employed. If not, there are a few quickie refresher courses out there which are relatively inexpensive.