Hi, I've been reading up on Bitcoin and I think it's a fantastic concept, and would love to invest a bit of money in it, but isn't it still early beta? Why are people putting money into an early beta version of the coin network?
Risk = reward = risk. If you want to wait until bitcoin becomes established and widely accepted, then it wouldn't be much of an investment.
Bitcoin is not "early beta." While minor tweaks are occasionally discussed (e.g., changing the number of decimals down the road, transaction fees, etc), bitcoin is more or less in the form it will stay in until it succeeds or fails. You might be confusing the official bitcoin client with bitcoin itself. The two are not the same thing.
I am having difficulty believing in the integrity of the code, and find the lack of security in the client disturbing (why doesn't the program require the user to encrypt critical files on first start?).
That is an excellent question, and one which I assume people are working on. Right now the client has basic functionality, it's up to users to manage security. Of course, the best way to get something done is to do it yourself, so feel free to write your own client if you so choose.
Again, the client and the bitcoin system are completely different. The former is just one way to interact with the latter.
Could someone link me to independent third-party audits by professionals of the source code for the client and the network?
Independent from who? It's certainly been crowd-sourced, the source code is open to anyone who cares to look.
Also, in spite of the talk of 'secure' transactions, I find infinitely more security in holding dollars or stocks. It's easy to invest in dollars held at U.S. depositories because the Federal Government provides a guaranteed $100,000 safety net (I believe in the fed more than some mysterious guy who may or may not have plugged in a backdoor in the source), and if you hold securities at a U.S. brokerage protected by the SIPC you'll recover your stocks in the case of fraud. Could someone explain to me, the boneheaded noob, what separates the security of Bitcoin from an institutional fraudster like Bernie Madoff?
Again, risk = reward = risk. Jesse James is a better example than Madoff - it's the wild west right now, just without all the violence. You may feel "secure" holding dollars or stocks, but I would argue that if you're technically competent and meticulous you can secure your bitcoins better than any bank. If you're not so meticulous, you either have to trust a 3rd party or live with the possibility of digital theft.
I really believe in the P2P cryptographic future, but I just want to play devil's advocate and do my homework before sinking capital into it.
You can research all you want, but no one knows where bitcoin is going (although almost everyone has opinions). If you're looking for guarantees, it's not the investment for you.