Bullish signs, so investors buying BTC. Ok. Why then not buy BTC at bitstamp for example, where price is lower? The difference between Gox and others is still rising.
Because those are not as trustworthy and can't handle that much volume and big players like volume.
Hhahah trustworthy like Gox? Well if you are looking at doing significant volume, one would traditionally do an off exchange transaction because even Gox's volume is ridiculously low for a currency market. Oh and one other thing, if you want to sell, when can you expect to see your funds? Hmm ya i'll just trust a shady Bitcoin exchange that tells me it will take 3 months to withdraw my cash.
Answer the question: why not buy BTC at bitstamp?
Not saying Bitstamp is bad. I also have an account with them and they seem very quick to respond to support cases and such but it was wild west until recently in terms of customer verification and such. One was able to basically withdraw cash to any account hold by a 3d party. That's something that could have them shut down. They haven't taken verification process seriously or regulatory hassle that's soon to hit them. I was reluctant myself to use them for this reason. They were also working with UniCredit bank which is very shaky bank according to some analysts, meaning it could go bankrupt when next Eurocrisis hits in full force.
As alternative exchange I liked Bit-central more, the French exchange which went under after some hacker attacks. That one offered customer segregated accounts not 1 big account where all customer money was pooled together and also offered account insurance for those funds.
To get back to your question though, MtGox receives most of the media attention and it's the go to place for most people, especially investors who want a safe bet in a very shaky and shady Bitcoin environment. Gox may be sluggish, cumbersome' n such but it is safe you can't argue with that and they've made steps to get regulated.
As Mark Twain said: "I'm more concerned with the return of my money than the return on my money".