Wow, to think they were worth $5ish some 6 months ago ... this is crazy. Also, IIRC, the amount of bitcoins that can be mined is limited to a certain number with the current system, at that point it would be interesting to see the value of the coins (or am I missing something fundamental?)

also worth checking out : https://en.bitcoin.it/wiki/Weaknesses
9 days later
So let's say you want to go with this kind of investment. How many bitcoins is safe to purchase? Is this considered a serious investment plan? Do you recommend to give it a try by purchasing a couple of bitcoins or just go large?
5 days later
What the heck! It's for $64.992 now!
Guys why does each bitcoin market have the same High price but various Low price? Do they all have the same buying rate but sell in different rates?
High and Low price are the lowest and highest prices for a transaction in a given period of time.
Last price is more indicative of current status.

http://mtgoxlive.com/orders
This graph shows how much BTC you need to buy or sell to raise or decrease, respectively, the BTC price.
6 days later
I monitored the rate for the past week. 20$ increase in just a week. Went to the bank and finally made the transfer; will wait till it goes down a little to do the bitcoin purchase, but I dont think it will go down anymore :(

I think it will go beyond 100$ soon.

Check out the date of my last 2 posts, the rate was 65$ back then. Now 86$.
I'm not cashing out, probably ever (I don't have that big amount invested anyway).

I didn't "invest" in Bitcoin so I could cash out. I "bought" Bitcoins because this currency makes more sense to me, and I want to progressively transfer all my cash into this. As more merchants accept it as a way of payment, I will gladly use it as my only currency.
How much do you think sounds as a good investment? 3-figure number or a 4-figure number?
@rahmu You're such a hippy.
Bitcoins are in a deflationary mode. They are not nearly saturated, and they are just getting introduced into the mainstream.
Some people have predicted it should become a "x 10 000" over a 10 year period investment.

Risky strategy
If you have balls of steel, I suggest you borrow some money, buy some bitcoins, then only cash out to return the borrowed dollars.

I made my first purchase on Feb 21, 13. By March 10, I sold my 9.5 BTC for $444, which I bought in three installments for $315. On March 15, I bought 10 BTC for $476. I can sell them for $845 on Coinbase.
This is crazy ... it doubled in less than 9 days
Definite bubble. I think what's happening here is demand is rising exponentially while supply is not keeping up. I can't really think of much use for bitcoins at this point except in the blackmarket trades (drugs, stolen goods, guns, etc...) . I remember reading an article a while back dooming bitcoins when they reached the 4 dollar exchange threshold.
7 days later
mtgox.com is down! BTC value got down from 147$ to 115$ (so far). DDOS?
4 days later
just hit 190 ... this is beyond insane now
I've always seen this "Bitcoins" things for more than a year over many sites, but I was never interested in it. Can anyone briefly explain to me how this system works and how it differs from a typical "investing cash online and watching a market rise or drop" thing?

also I hear many of you posting about using GPUs and overclocking to "mine" this currency.. what is that about exactly?
Bitcoin is a crypto-non-centralised unbacked currency.

GPU's do computations in parallel, and thus can (were able to) find answers to made up "hashing" problems agreed on by the network faster than CPUs. They have grown mostly irrelevant, and FPGA's have taken their place. Soon ASICs will take FPGA's place.
225 right now

40$ increase in just 24 hours
I sold 10BTC for $1800 fearing that it will crash hard. Bad mistake.