I have to chime in here.... I am VERY optimistic about the domain industry right now as a whole. I think there is a lot of money to be made right now IF you are smart in what you are doing. At the same time, I was one of those in the business back when the dot com bubble burst and I saw/felt first hand the effects it had on the domain industry. I remember when it was hard to get LLLL.com's and then within 2 years, a huge percentage of them had dropped.
I think that we'll see trends online just like 'traditional' economy sees. It is inevitable. At the same time, the problem with the dot com bursting before is that a lot of money was thrown at ANY business that had a business plan because of hype. It didn't matter whether or not it was a viable *profit* model. Unfortunately what happened with domains then was like throwing the baby out with the bathwater and the market has a slump. But it's like the stock market - those that recognized a slump rather than an irrecoverable crash in domains have made a LOT of money.
I WOULD be concerned about things over a very extended period of time (ie 10+ years) for the industry simply because we don't know what the net will look like then... but the reality is that there is SO much money tied up in the current domain naming system that I think at least for the next couple of years, whatever changes that do happen won't be taking place overnight and there will be a lot of industry/organizational reluctance to move away from it. If anything, I think we're moving to things being more stable rather than less.
Look, for years now I've pointed out to people my experience in dealing with the advertising industry. Companies think NOTHING of spending millions on a single ad run. If anything, solid domains are UNDERVALUED right now compared to every other form of advertising.
Let's say worst case scenario that we have 10 more years left of domains. There's a domain XYZ.com that gets 10,000 unique daily visitors in the financial sector that is generic in nature. Doesn't matter who owns it, it will get at least that many visitors. For a company IN that sector, 1 in 20 visitors translates to a lead and 1 in 5 leads are closed representing a profit of $100. That is only a 1% conversion rate which many people in marketing would consider low. 10k visitors with 1% conversion = 100 closed sales a day or 10,000 in PROFIT. Over ONE year, that is 3,650,000$.
You can take the numbers further - what if this was a mortgage lead site or something similar where the profit was $1000 or more per closed lead? Or what if the $100 profit was PER YEAR or PER MONTH?
Seriously if anyone can even say that premium domains are overpriced or that we are heading for a crash with inflation, then get out of the business (and sell us all your premium and traffic domains at crash prices

).