Why invest your hard earned bitcoins when you can just hold them and use that as your investment, got to be safer than any other investment opportunities.
That's very true, why would you risk your bitcoins into another investment knowing your Bitcoin will grow in value over time. That's part of the reasons I've decided to save mine for future price increment.
For for the time being, it is better to use bitcoin to buy some altcoins as they are rising very fast now.