Yesterday, mcxNOW—a cryptocurrency exchange supporting Bitcoin, Litecoin, and several other altcoins—started paying its users interest on their digital deposits. The interest rate is variable and dictated by the trading fees collected by the exchange.

It’s an interesting move, and if it’s successful in significantly growing mcxNOW’s user base, you can bet that other exchanges will launch similar programs. Remember that while earning interest on your deposits may feel very bank-like, you’d be wise to treat online exchanges as your own personal cryptocurrency piggy banks at your own risk.