Since Surface Web is somewhat lacking info about some news in cryptocurrency
I don't see how the surface web could ever be lacking information, specially when it comes to news about cryptocurrency. Just a simple Google search and you'll have millions of answers right in front of you. If you'd want to receive news on a daily basis you can do that easily signing up to all the e-mail campaigns that cryptocurrency news sites provide. Some popular sites to start of are
cryptoinsider,
cryptocoinsnews,
crypto-news. In some options you can even specify which type of news you'd like to receive.
If you want to get specific information on a single topic Google also provides millions of options for any coin. You just have to Google it. If you're following a specific coin then a good idea is to follow their social media accounts in order to get the latest news directly from them.
There are not any pros of gathering data on the deep web when talking about cryptocurrency news, you are in a better position just using traditional methods, like Google.