I think that some sort of occasional trading breaks would be fantastic. The recent crash was possibly purposely done on a low-volume day--A holiday in the US. In the very least, having fewer trading hours or days would mean better-balanced trading.
This would be especially useful because Mt. Gox and other exchanges lack the more "automated" functions that real exchanges have, and thus require constant babysitting by traders. We need exchanges to have circuit breakers to protect the exchange. But we also need individual stop losses, shorts, options, and some means to automate trading for people who don't know or wish to use the API. The API was useless during the crash, after all, and my personal stop loss bot wasn't able to do jack shit. The API should not be relied upon for such a basic function as stop loss orders. And they're practically mandatory for playing with volatile stocks.
I saw on the Live Bitcoin TV thing that someone asked about stop loss orders, and the Mt. Gox guys DIDN'T EVEN KNOW WHAT THEY WERE. They thought a stop loss order was a circuit breaker for the whole exchange, and then talked about how they have some piece of software that alerts them in the event of a crash. Wow, that's some heavy duty feature there, ace. Two lines of code that would halt the market during suspicious trading could have saved us from this whole rollback debacle if only it was there before.
Phew. So my point is that, because obviously anyone who has more than two dollars in bitcoins needs to watch the market like a hawk, it would be nice if there were breaks.
There are a few solutions that don't involve hurting or helping one particular region:
1. Advance the trading hours by, say, 2 hours every day. Monday 8am-6pm, Tuesday 10-8pm, etc.
2. Close on weekends. In the very least, close the exchange every X many days so that we can have a break. This is also good for bitcoin as a whole because other exchanges will probably have different schedules. It also lets traders plan schedule-dependent trading strategies. Finally, it gives people who, you know, actually use bitcoins as currency and not just to trade back and forth for dollars, time to adjust their sale prices rather than implement some duct-tape solution of prices being dynamic based on Mt. Gox rates (why not just skip the middle man and sell in dollars?)
A lot more people would be willing to accept bitcoin if only they could predict what the value will be in half a day. If you take bitcoins as payment right after the market closes at 6PM and the market opens at 8AM, then you have 14 hours of, essentially, a flat exchange rate.
For that matter, market openings and closings are exciting, but predictably so.
Also, it'll help bring in other investors who are used to scheduled markets. Right now, we have a problem of "dump on friday, buy on monday" because these more timid people don't want to have to sit near a computer all weekend babysitting their bitcoins. It's easier to just get out and relax.
Also (again), stronger bid orders will be placed because people tend to put in orders if only they have a reasonable guess as to when it's going to be filled and if they'll be available then should they need to move the order. In other words, bids drastically decrease on Fridays, even though weekends have seen profitable dips lately, because nobody wants to have their bid filled when they're not around, especially if it looks like it's going all the way to a penny.
Also (a third time), the break will give Mt. Gox a chance to plug security holes and, you know, answer emails and do a little customer service rather than leave us immersed in conspiracy theories and third party knowledge of what some dude said in IRC.
Also (hell, why not?), bitcoin will be slightly more stabilized due to the miner/buyer schedule problem. What I mean is, people mine 24/7. Some miners sell as soon as they get even 1 BTC. So there's constant selling pressure, but buying pressure, as we've seen, depends greatly on bank transfers. Constant sell pressure, sporadic buy pressure: It's a recipe for volatility.
Also, also, also: also.