I think the question, from the standpoint of the bitcoin community is a valid one, and the question is not if such a fund would be viable. If one such fund is established and profitable, more will follow. The question then, is what exposing bitcoin to the whims of the mass market will do to bitcoin as a political and philosophical project.
As a newcomer to the bitcoin community, I got very excited about the idea and immediately wanted to invest. The first thing I did was see if any of the venture capital firms investing in bitcoin startups trade on the NYSE. There is no dedicated bitcoin investment fund, probably because the market is simply still too small to cover the cost of trading on such an exchange, as Death and Taxes pointed out.
From my standpoint as a believer in bitcoin, I think the more mainstream exposure the better. I am confident that the developer community will find ways to keep bitcoin one step ahead of regulators, even if the libertarian faction eventually becomes a drop in the bucket. I mean to say, I don't think mainstream exposure will ultimately have consequences in terms of the freedom that bitcoin brings to monetary transactions, and increasing the user base will probably increase bitcoin's vitality.
I am no expert in the financial industry, but I believe hedge funds keep a small percentage of their portfolios open to invest in high risk endeavors. I think that a wall street bitcoin IPO of some kind is inevitable, and I think when it happens it will be huge. It seems to me there is a great deal of capital that is eager to get into bitcoin, and once standard channels are opened for that capital to flow into bitcoin, things will get very interesting.
It might seem that a value increase on the scale that allowing capital to flow unimpeded into bitcoin might generate would put the deflationary counter argument to bitcoin to the test. I think that at that point bitcoin might be held as a store of value and simply transferred into litecoin or other alternate currencies that are easier to use for day to day purchases, because the use value of bitcoin is not going to go away even if people try to hoard them. Hoarding will eventually lead to a collapse in prices and a subsequent sell off and buyback. Furthermore, Krugman's argument comparing bitcoi to a D.C. babysitting cooperative ignores the fact that a babysitting cooperative doesn't have the potential to revolutionize global trade and render economic sanctions as a policy instrument all but obsolete.
So from my limited experience and now having a significant vested interest in bitcoin on both economic and ideological grounds, I would say bring it on.
Regarding a dedicated VC fund,
Just posted this to the press section:
https://bitcointalksearch.org/topic/2013-05-29-new-bitcoin-vc-fund-seeks-edge-with-regulatory-security-skills-219553exit: You said investment fund, thought you were speaking about a vc fund, still though, one more small step for bitcoin.