My biggest fear came when Plus500, an online trading platform, sent me an email with bitcoins as investment. These trading platforms are designed to operate with the global financial scam of selling and buying "endless nothing" and as so it includes a way too dangerous feature for the bitcoin world, the so called "short orders".
For those unfamiliar with this term, it means to sell empty handed and then try to buy back later on to fill the order, expecting the prices to go down for it, unlike long orders where you buy to sell later, in which case the investor is expecting prices to go up.
This trading platform was announcing to be operating with MtGox, then this is most likely to cause MtGox to turn into a fractional reserve and soon enough into an empty handed reserve. With people selling non-existent bitcoins and regular bitcoiners withdrawing real bitcoins out of those "sales". Specially taken seasoned bitcoiners do not leave their coins deposited anywhere but their own personal wallets, emptying the now fictional MtGox bitcoins.
Plus500 is not taking Mtgox quotes anymore, same as eToro. About Plus500, you can buy or short bitcoins with BTC-e quotation, they close your position every 30 days. It would not be too smart to open a position near the end of the month. I do not know what you mean with "global financial scam", you can trade there and take a profit (shorting or buying any CFD) including bitcoins.
There was a time were they closed your position daily, but it is up to you to take such a risk (buying or shorting). You can do that with litecoins right now (plus500).
I got some profit shorting bitcoins on plus500. They closed all positions around $250, when they decided to use BTC-e charts. From 850 to 250, many investors made a big profit there (leverage 1:10)