The dichotomy is that whenever the media or experts have posed these questions, the Sensex has vaulted higher and higher. It took about seven months for the Sensex to rise from 6000 to 7000, another two-and-a-half months to touch 8000, just two months to reach 9000, three more months for 10000, and just 45 days to touch 11000. No wonder, investors are worried about the rapid rise in the market. While the answer to some of these questions are not easy to find, read on to get a feel of this bull run and how it could pan out in future.