The last couple months, BTC lending rates (to give one example) have typically been between 13–15% . Yes, that's right, That doesn't seem like much on first glance, but it adds up over time.
I am quite content with 13% per year. Unless you're an expert trader (I'm a crappy trader and not afraid to admit it) this is a much safer way to make money than trading, and still way more than you would get from holding your money in a bank. Plus it's less work than analyzing charting patterns and watching trading positions all day long.
Initially I started with 0.5 BTC, but now my portfolio is more than 3 BTC.
Note: I'm not advocating using 100% of your funds for lending, that would be a terrible idea. Lending Bitcoin(https://xcoins.io/investors?r=1vxzhz) is just one component of what should be a balanced investment approach .