Actually i want to know when we earn btc how can we get it to cash . Is there any secure website or something
In our country philippines we use coins.ph to transfer bitcoin into our currency or to withdraw it in other banks.
There's also Abra too where you can withdraw your BTCs into local banks

My friend tried it few days ago and she was able to receive the funds after a couple of days. There are tellers too where you can exchange your BTC to local currency but with a fee as far as I know.