Casascius has outlived its original intention. It was great as a novelty when Bitcoin was at $5 and they could be used as a great marketing tool. But with their high price and the ability to break the seal without being detected as well as the counterfeiting that was starting to happen they were beyond their usefulness as anything other than a trinket.
That's about right. As the maker says of the 1 BTC coin, "Perfect as a small gift to introduce someone to Bitcoin." At $5, nobody was likely to bother to crack the security. At $1000...