Very cool coral. The wild ones coming in are a bit smaller, and not as colorful as the ORA morph. The wild ones have been a bit cheaper lately. I think the captive propagated bright green ORA morph will always hold its value.
Every coral has a 'fad' stage. Whenever a large group of the saltwater reef community becomes interested in a coral, or a specific morph, its considered a 'fad'. Duncans have been popular with collectors for probably 8-10 years now. For the longest time, the ORA one was about the only one you could get. With the wild ones coming in, the current availability has just increased the interest.
Like some of the 'non-indo' acan lord morphs, I'd bet the ORA morph will always be the one Duncan enthusiasts will want to get ahold of.