Yes, hitbtc has a demo site for trading cryptocurrencies. You can explore it there. Just a point though, hitbtc got a red trust from bitcointalk I guess way back then. I don't know how they got it.

If you want, it is not hard to practice crypto trading even in the real exchange platforms. It is not like in forex where you can easily burn money. In crypto trading, you can simply observe and then jump into it with a small amount just for practice.