The particle nature of dark matter is the simplest solution to the gravity like effects that cause the rotation curves of galaxies. Even if the next running of the LHC or the experiments under ground don’t find either WIMPS or MACHOS, experimentalists wont give up. Its been only 8 years since the Higgs confirmation.. It the particle theory is right, it’s just a matter of time, technology, and statistics. In the meantime, I’m sure there are plenty of theorist looking for a new theory as radical as Einstein’s gravity is compared to Newton’s gravity to explain “dark matter.”