IPhone, should I save new contacts to iCould or to iPhone?

If I save to the iCloud I can access these contacts from other device, if I save to iPhone I feel they are more secured. The phone doesn't let me do both.

Thank you very much for taking your time to give me advice.

Save to both, I have contacts on my phone and backed up to icloud, you can sign on from your computer at http://www.icloud.com/...icloud.com and see what you have backed up there

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