Your question is curious, the cash out is converted your points to the cash money.
Points are automatically convert to amount when you make your payment to cashout.
If you have the points it should be converted into CASHOUT if you want. Otherwise it is not possible to get cash.
If you want to receive your payment then yes it is required to transfer your points to cashout.
Yes, it is necessary. But, there is no any different / specific way to convert points into cash. Whey you will try to cashout then your points will be automatically convert to cash amount.
subject of your question is not clear wish you more information so that members can correctly answer your question