Hi @Cryptopotamus,
Currently, our margin requirement for trading cryptocurrencies such as Bitcoin and Ethereum is 25% offering you up to 4:1 leverage to magnify gains and losses. However, this may change due to market conditions. Our website will list our most up-to-date margin requirements.
Traders reading this thread may also be interested in an earlier discussion @Cryptopotamus and I had about the relationship between leverage, margin requirements and volatility when it comes to trading cryptocurrencies such as Bitcoin and currency pairs such as EUR/USD: Volatility of Bitcoin vs. EUR/USD