Nobody knows the true risk for certain. There was one huge wave in the early going with some very early Pokemon edits. After that, brick reports were rare and sporadic. There was a small spike again a couple of months ago (not nearly as pervasive as the first spike but still significant), but that has died down. There was no immediate thing that could be pointed to as the cause that could be associated with this one.
The first bricking spike had an association which led to the removal of 2 Wonder Cards and may have been one of the true motivations to initially remove the Diancie, AZ Floette, and stones since this all happened at the same time. There was a huge association with the first Wal-Mart Garchomp Wonder Card. They removed pretty much all of the new content that they had rolled out over a two week period and have very slowly been rolling it back out. Now I will admit that some of the slow rollout (like the stones) is most likely due to marketing now, but I do personally believe that the initial reasoning for the take down was the brick spikes. Datel seems to have done a much better job of vetting the edits since then and there has not been an association of bricks with anything like the first Wal-Mart Garchomp edit. As a matter of fact, the Garchomp that was released again is a completely different card. They even went back and overhauled the first Torchic card. The cause was found to be an errant rewrite of the save when Datel sent it back so it was truly a Datel problem (although they never did admit it.) This was discovered by hackers who exploited a now closed hole in Datel's security in order to hack. The second smaller brick spike didn't have a clear association with anything and it is hard to tell what really was associated with. In the end, there does not seem to be any mass bricking going on right now.
In the end, you just have to ask yourself, are you willing to assume the risk? For me, I'm willing. Although I will admit that I have 2 carts, and I pretty much only use 1 cart only on it. The other I have inserted only a few times to do backups on. There is always going to be that small risk