There is a danger! If you leave your account untouched for too long MtGox might close the account and take any currency in it. When bitcoins were $5 a btc MtGox took $200 from me. I haven't touched them since.

Also, they will let you open an account and send money to it and then when you try to take the currency back around they will request verification, or more verification, or then throw in a verification issue they could have mentioned before the fact, or at least they did a year ago.

I don't trust MtGox. Their is nothing good about them. Trade lag nearly 24/7, and really no benefit to using them.

Personally, I'd stick with another exchanger, but that is just me.

And MANY exchangers within the last 2 years have been hacked at least once with most people's bitcoins lost. MtGox has at least been secure so far.