Like most cryptocurrency exchanges, Bitrush does not offer leveraged trading. For those who are interested in this, there are exchanges like Kraken, bitFlyer,Coincheck, Poloniex, Bitfinex, GDAX, BitMex, who offer this service. There are also many forex and CFD brokers who have included CFDs on one (usually Bitcoin) or several of the popular cryptocurrencies, for speculative trading. Such brokers are IG, HYCM, easyMarkets, Trading212, Admiral Markets, Plus500, Swissquote, etc..
Bitrush is one of many websites where you can buy bitcoin online. The site seems particularly good for Europeans accustomed to transferring money with iDEAL, in which case Bitrush charges a fee of just 0.37 EUR (with no percentage-based fee charged).