Even though that's not really accurate... People either don't know about it, don't understand it, and/or have alt-coin fatigue. Give it some time.
P.S: The people who do the most trading are not necessarily the most technically skilled. We can expect a lot more activity once counterparty becomes more understandable to end-users and people from the finance sector. This is something we have seen / are seeing with Bitcoin. However, because the fundamentals are already accessible, we can expect this paradigm shift to happen in a shorter time frame.
- The Internet was initially for 'hobbyists' who understood enough about Computers to make it run. Now the majority of people have some form of internet connected device, and can use it easily.
- Bitcoin started as a form of 'monopoly money' that people were using like gold in a MMORPG. You had to beg for someone to sell you a pizza for 5000 BTC. It worked, but it wasn't easy to understand and its value was not recognized.
- Counterparty started with incredible code voodoo that accomplishes exactly what it claims. There were no promises or persuasion tactics made. XCP has competitive advantages in its field, in that it is the first and only working peer-to-peer financial market. It is a unique new concept, built using Bitcoin like Bitcoin was built using the Internet. It is progressively getting easier to use, but at the moment people cannot yet intuitively grasp this concept.
tl;dr: If you were asking questions like this when Bitcoin started, you would have probably missed out on a great opportunity.