Absolutely not. It is a complete waste of money in my opinion.
Yes they're "appealing", "cool", "modern" but people DON'T need them.
I've owned only 1 word domains such absolute club, everything club, replay club, leo one, ok network and many other.
Never receive a single offer/made a sale at sedo.
3 sales in 6 years via afternic ($5k in total and for me is nothing).
I've earned 1 month salary in 6 years with newGTLD.
Look at namebio, dnjournal, the ratio is 99% .com, maybe 1% newGTLD.
Sometimes several weeks passes before we see a newGTLD sale (most of time registry sale, not domainers).
My next step in domain industry is to take $10k and invest ALL in quality com.
Look at
@AbdulBasit.com or
@TERADOMAIN , they have success but they invest only in quality com.
And I want to do the same.
PS: I could have made more money if I had bought lottery tickets instead of newG. In the worst case scenario, I would have lost 60% of the invested capital, perhaps I would have gone in balance but I would have hardly lost 90% as happened with newG. Stay away from them.
PS2: I am still waiting for the newGTLD succesfull domainer, and I am not talking about selling newGTLD for $500k and have 50k to renew to renew (NET after renewal, commissions and taxes at the end of the year $12k aka $1k per month).