Beware!
www.bitcoin-24.com is not safe! I used it last year, and after some months it started having problems (both tecnica and administrative) so the owners shut it down.
Since then, I sent many email (abount ten in 2013) and never got a reply.
Many forums arose to support those who have been tricked.
(here, one forum and one thread:http://bitcoin24-support.boards.net/thread/86/mailing-25-year-btc24-relaunches)
Now (july 2014) i found the service back online, but none of my previous accounts is working.
More: the new company (Bit Revolution Limited) said with some email to other users it has nothing to do with prevoius owners, but the new company is still owned by previous owner (Simon Hausdorf).
Hence?
www.bitcoin-24.com is not safe as long they do not refund back in money or bitcoins their previous users.
How do they expect to be considered reliable if once they blocked money, bitcoins and never gave answer and explanations???
As long I will not receive answer, I warn you, bitcoin-24.com is a fraud, and since is back, I suppose it will be even bigger.
My opinion is: "Do not trust bitcoin-24.com".