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bitcoin noob but here goes. I have a bitcoin address (obviously) and someone has sent me bitcoins. Now I don't have a wallet just the address (public and private) in order to withdraw from an ATM or maybe even purchase stuff? Do I have to create a bitcoin wallet as well? Sorry if that is a REALLY dumb question but I don't know too much about this stuff. Thanks guys
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By having the private key you can sweep the wallet using a desktop or mobile wallet, I recommend electrum.
If you are new to the bitcoin world, visit https://bitcoin.org that has a lot of information so you can get up to date and get out of duduas
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You're just puzzling your self.
If you want to send your Bitcoin to someone or buying some product. You will need a Bitcoin wallet or you can sweep that address funds to the destination address using e.g. electrum..
I don't much about exchange or how to withdraw your bitcoin from an "ATM" but you have to check localbitcoins.com, they can exchange your bitcoins based on your country.
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Get a wallet and import your privkey
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Not sure what you think you have. If you have a private key, you a have a wallet, albeit one with a single address. If you don't have a wallet app, you'll need one to import that private key. – Osias Jota – 2018-03-13T23:13:32.170