It does seem like a very interesting strategy though, that can probably make one even more money than investing directly in Bitcoin, but for that to work I think you need a sizable ($10,000?) amount, and only invest a few hundred dollars at most in that position. That way you can still make a lot of money if Bitcoin keeps increasing, but if it does happen to drop quite a lot, at least there's a much smaller chance of losing all the money.

Put in $300 and they give you $300. I opened it yesterday got a position on BTC same day (would be fun to get real BTC though). You can buy .01 lot with $300.

http://www.avatrade.com/?ref=38634