I've discussed a lot about this in many of my last interviews. @bitfinex has one of the top #bitcoin
and #ethereum cold wallets by size. It's highly profitable and has an important community.
Don't get tricked by volume metric. Just we don't take part to the 0 commission war. 
https://twitter.com/paoloardoino/status/1209512473109389313 …
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Some shitcoins on bitfinex have 0 volume, thats cant be good.
Some Altcoins are a niche and should have a volume close to 0. In normal finance small listed companies don't have an active market not an active order book. Here's the same. You shouldn't believe to big volumes on small cap tokens. That's pure fried air.
