Depends on where you live and the amount of bitcoins you are talking about.
You can try selling it at localbitcoins.And buy again from a reputable trader.
In my location localbitcoins traders usually buy at 5% below the market price and sell for 10%+ over the market price (plus some fees). Also if the price is high then they can just refuse to buy it.
Or deposit your bitcoins at neteller for USD(you will be charged with a 1% fees).You can easily buy again with neteller.Many traders accept neteller for bitcoins here.
Buying crypto for reversible payment methods is usually a real cancer. People are asking like 10-20% fee and it takes extremely long to find a btc seller.
If you are just worried about the price drop, then how about converting them to a more stable alt?
Like what? Tether is supposed to be the most stable alt but it doesn't seem trustworthy.
If you want a safer option to buy and store bitcoins securely ,coinbase is the best option.However you have limits on the max you can buy in a day until you are fully verified
The best option for me is to find a place where I can sell my BTC for USD and can store the money for some time (up tp spme month) and then buy BTC back. I would like to avoid different card withdrawals.