You can fetch a better rate by lending bitcoins on this forum. People get a rate as high as 3%-7% per week which is better and you can lend people with a good reputation to ensure the borrower is trustworthy.

I also buy/sell altcoins with my btc and earn a good profit. I bought ETH when the price was 0.03 and now the price reached 0.06. It's much better than lending money.