You wouldn't be wasting money, since after the initial version goes to 1.0 (sometime this Spring, I would guess) the price will go up. Another reason you wouldn't be wasting money, and probably the most significant, is that if you buy the Deep-Animation version now, all of the updates for TG2 will be free for you. Planetside has made it clear it will make some significant changes to the animation module for those who purchase this version.
Besides, it's a very cool program for the money. By the time of the next update and especially after this goes gold, you will have learned enough to create some pretty cool art.