To save money, yes.
You get a proper rebuildable, and when your coil gets gunked up, you just take out the wick and dryburn the coil;
btw, you can/should also be dryburning your coil on the nautilus instead of just tossing them after 3 days.
With the rebuildable, after you dryburn the coil and rewick, it's as good as new; and after a few weeks or months you might have to recoil; altogether costs you like less than 1% what you would have to spend in buying coils all the time.
Whatever rebuildable you get, and I assume you'll get an rta like a kayfun, consider picking up an rda along the way. With an rda, you can pop the cap at any time and fiddle with your coil; sometimes you just want to try shifting the coil a little closer to the airhole; couple days ago I did that and ohhhhh yeaaaaaaaaahhhhhhhhhhh; or maybe you want to just do over the coil different;
experimenting on an rda is worthwhile because what works on your rda you can then try on your rba.
With a kayfun you basically got to pour your juice from the tank back into the bottle before you can get to the coil to change or adjust it.
