i have been wondering about this too, and great to see the thread. i am not near as much involved in domains as i was a few years ago, and still remember the THRILL of getting into 4-letter .coms when the "original" llll bubble started to get blown to max capacity from left, right, up, down and in between.... including by yours truly. I had some fun, was great to at least "feel" like I was in on the next big trend just in time and I made some quick ROI on a lot of domains in that frenzied time..... but also wound up holding on to MANY domains that I paid dearly for that, once the bubble burst before I could flip them, really didn't have a chance to sell and break even anymore, ie the market was still flooded with way too many similar quality domains at "selling at a loss, but these renewal fees are killing me" prices and there were ZERO potential endusers that I could find. Some I sold at a loss, some I held onto, some eventually DID sell to endusers and some I hold onto still....
I have sold several of my "bad quality" domains over the last year or so, many to chinese buyers, for "back in the day" quad premium prices or even better, on domains that wouldn't sell for $50 here even a year or 2 ago. But of ALL the domains I sold to them, i had previously already reached out to any and all potential buyers, ie registrants of other extensions (that were also usually from China) and any businesses.... never sold any. And all of the domains that I sold, when I look now, are all parked/still available for sale.
I have no doubt that the growing market in China, and their interest in short domains, is a great thing for the niche, and am certain that Chinese domainers/people familiar enough with the language and/or diligent enough in their research, can scoop up some great domains that make just as much, if not more, sense to buy as a speculation/investment domain as many of us did here using "quad premium" or similar criteria.... they know which letters, linguistically and statistically, have the most reasonable chance of selling to an enduser for a profit immediately or eventually. But, at least based on my limited understanding of the different letter preferences etc, it still seems like there are currently a LOT of domains here on the forums and the marketplaces that neither seem promising in an "old school" english language quality letter assessment nor based on what would seem desirable in the Chinese market (ie no vowels and/or V etc) which makes it feel like we are beginning to puff up prices based on no clear reasoning.
And while I am STILL a very big believer in short acronym domains, and 4-letter coms are my favorite domains, seeing this relatively very quick and dramatic interest in domains that were being ignored, laughed at, sold dirt cheap and being picked up for peanuts when they expired... these domains were here all along, ripe for the CHEAP picking, and expiring left and right.... but now suddenly they are "must have" domains?
For the health of the market, I sure hope that it maintains...... but I will stick to buying domains where I can see potential for sale, regardless of the letter quality here or there.