Disclaimer: I am not responsible for anything you may decide on reading this article.
So First, what is a master node? A Master node is a Crypto Coin Wallet, usually, it is a special wallet host on a server or on a local computer that you are willing not to turn off, and this wallet holds a predetermined amount of coin (in case of CHC you have to have 1000 CHC) that makes it a master node.
This master node will verify the transaction made on that coin's network, and in return, the master node gets paid, so it is a way of passive income.
so this group (high on coin community) calls people for Holding chain coin (CHC), as they bought enough for creating master nodes. and they were successful so far.
https://www.youtube.com/channel/UCgvd47Db8jiKiwsuuOBwMoA
2 days ago I came to be aware of this HODL thing when CHC was at $0.70 and I didn't believe in it and now as I am writing this article it is at $3.09, and now I am regretting.
go review the coin, review the community and decide for yourself.
the CHC coin is being traded on Cryptopia Exchange:
https://www.cryptopia.co.nz/Register?referrer=sarkawt909
CHC Website:
http://www.chaincoin.org/