That's true you can see many altcoins become $0 and looks dead because there's no development on the project. Bitconnect is only one of them, if you want to see you can look another dead coin you can find at
https://deadcoins.com/.
I have visited the
https://deadcoins.com/ site. And after visiting the site I have found some coin which is now trading on binance and team is still working to develop the project. But on the site, its marks as Scam coin. One of them is Pundi X coin[ NPXS]. So really all the data is 100% accurate of this site?