You will need to create an account on Cryptsy.com or on Bitstamp.com (trading platforms) Setup so that all your received payments are automatically forwarded from your GoUrl.io account to your account on Cryptsy / Bitstamp (enter your Cryptsy/Bitstamp coin wallet address in gourl payment box settings). And use the "autosell" feature (auto trade your cryptocoins to USD) on Cryptsy/Bitstamp. Using that functionality you don't need to worry if cryptocurrency prices go down or up. Within 1-2 hours after a cryptocoin payment has been received by you, your payment will be automatically converted to USD on Cryptsy/Bitstamp and will be kept on your Cryptsy/Bitstamp USD account. Later you can withdraw your USD from Cryptsy/Bitstamp to your own USA/UK/France/etc bank account
The big benefit of our GoUrl Cryptocoin Payment Box/Captcha is that it fully integrated on your website, no external payment pages opens (as other payment gateways offer).