2% interest is not good enough to attract normal investors, comparing with the associated risk level. There are many investments in crypto world, which yield more than 5% yearly.
HaoBTC is a wallet first and an investment vehicle second. We mine BTC not only cuz it is profitable, also because hashing power is voting power in the world of Bitcoin. If you are looking for a high-risk, high-yielding investment, HaoBTC may not be what you are after.