If you want to be silly, sell them on a exchange, like binance or something.
If you want you can trade them p2p, find someone who wants to buy them and take cash for them, or something like local bitcoins.
If you want to use it as intended, buy items with them,
https://www.gyft.com/bitcoin/ is a great site, there is many places that accept bitcoin now.
i don't get it. weren't you making a big fuss the other day about how wrong it is to sell bitcoin for fiat? how is selling them through bitpay for gift cards any different? bitpay dumps your coins for fiat, gyft gets paid in fiat, you get a card with fiat value so the merchant gets paid in fiat. it's all about the benjamins!
as long as merchants are using bitpay and other payment processors to convert to fiat, spending bitcoins generally means selling them for fiat. the only difference is now you're stuck with a gift card where cash is much more useful.
And I don't get how it is that OP set up a cold storage without knowing how to convert them back to usable coins and then fiat money. Setting up a safe offline storage is more difficult than installing a wallet or converting to fiat on one of the popular exchanges. On coinbase converting to fiat takes maybe 3 mouse clicks and 5 seconds of your time.