The best and the safest way to sell your bitcoins is to be a part of trusted and reputed site and it will also depend on the country that you are living in as for me localbitcoins is the best place to sell my coins.
Part of a trusted site ? what you mean ? I think there are a lot of exchanges that can give you paypal, skrill or anything you want so you can those and then convert to bank money. By the way I am curious that there are debit cards of BTC do they work on online shopping ? if so we don't need cash anymore
