Most of the blogs are shit, they're plagued with ads and aren't going to give you a real opinon anyway as all they're looking out for is their sponsors that pay gross amounts of money to get them on here. So it's tough to really find a good one, though when you do find one you must hold it for as long as you can, as it will soon be corruputed.
Back on a serious note, you just have to know how to comb through the bullshit on these sponsored blogs. Use the sub reddits for crypto trading, sites like this -
https://cryptopotato.com/ and so on and so forth and you should be alright.
It's just like the normal news.