Taking into consideration high prices for Chinese premium LLLL.com, we may assume that gradually all global supply of such domains will be bought up by Chinese population, who are ready to pay such high prices.
Assuming all Chinese premium LLLL.com (160,000) will be owned by Chinese people (1.376 bln), i.e. 1 domains per 8,600 persons, remaining 297,000 LLLL.com will be spread over remaining world population of 5.93 bln, or roughly 1 domain per 20,000 persons

. To imagine how rare LLLL.com are, on average, imagine that in the whole London (population ca. 8.6m) there will be less than 500 persons each owning just one LLLL.com.
And the amount of LLLL.com will not be increasing, as i.e. amount of luxury watches is increasing each year.
We may consider that in the rest of the world, LLLL.com might be considered in the future as a collectible item, similar to LL.com and LLL.com nowadays.
If we compare such collectible item i.e. with much much more widespread Rolex, which is produced each year in the quantity of 750,000-1,000,000 pieces, and sold on average for USD 10,000 per piece, we may consider that even 900-1,000 USD being paid now for Chinese LLLL.com is a relatively low price, comparing to other collectibles brands.
Sources:
Population: https://en.wikipedia.org/wiki/China, https://en.wikipedia.org/wiki/World_population
Rolex production volumes and prices: https://en.wikipedia.org/wiki/Rolex
Chinese premium prices: this thread.
DISCLAIMER
The author owns several LLLL.com domains and may be biased.

