1Answer: There is only one bitcoin node in Nigeria which is in the
metropolis of lagos.
You can confirm that through this link
https://btcmanager.com/news/what-is-going-on-with-bitcoin-in-nigeria/

2 Answer:
There are a lot of bitcoin exchanges in Nigeria. They include
1. nairaex.com
2. bitkonga.com
3. naira4dollar.com
4. instantgold.org
5. nigeriagoldexchange.ng
6. nigerialocalbitcoins.com
7. nairaswitch.com
8.  remitano.com
9.  luno.com
10. winkpayment.com.ng
11. 247exchange.com
12. myceliumlocaltrader
13. shapeshift
14. bitcoin• otc.com
15. cashaa.com
16. coinxchange.biz
17. etradexchange.net
18. standardgoldng.com
19. nairafinex.com
19. coinbase (us based)
20. circle ( us based)
21. snapcard (us based)
22. coincorner (UK based)
23.  changetip (us based)
24. coinmama (virgin islands based)
25. clevercoin (Netherlands based)
26. CEX.IO ( UK based)
27. jostpay.com
28. zitcexchange.com
29. coindesk.com
30. bitcoin-sleekarena.com
31. ICE3X
32. entromoney.com
33. ijamexchange.com

3 Answer:
The approximate amount of bitcoin traded monthly is within the range
of 5000- 6000 bitcoin
You can check this link to confirm
http://www.newsbtc.com/2017/01/30/nigeria-bitcoin-weekly-1million/

4 Answer:
No, there is no any crypto or bitcoin ATM in Nigeria.
I have never heard about it and there is no record showing its existence

6. Answer:
Yes there are some bitcoin communities in Nigeria on Facebook. They include
1. MMM Nigeria Bitcoin ( members are more than 27,000
2. Bitcoin naija (members more than 2800)
In nairaland forum there are more than 1.7 million members and more
than 3 million visitors daily, members can post almost anything in as
much as it does not violate the rules set by forum administrators.
There are a lot of topics on bitcoin and cryptocurrency.
You can confirm this via the following link.
www.nairaland.com

7 Answer:
The preferred social media for the bitcoin is Facebook, nairaland and
WhatsApp groups which are many