It's currently enabled on the (Skynet) testnet. The Qtum mainnet (with support for POS/staking and the DGP) should be released in September or October 2017. You'll be able to stake the QTUM coins that you hold in a Qtum wallet on the mainnet.

I got the test coins and have staking running. it is little confusing if these coins have no value even after maturing then why someone would do this? Just for testing purpose until the mainnet is released?

Yes, until the mainnet is released, this is just practice. The steps will be the same (it will just be a different binary for the mainnet). Also be sure to read: .

Just a heads up, never post the number of any crypto you have in a public comment