1. If you are full time trader yes. But full time traders in stocks and shares, where you handle commissions and budgets and portfolios.
2. Why I say not for crypto? Because news does not affect it like stocks do. The highs and lows of crypto markets seem to be affected by events more than news (like whales selling, regulations banning stuff). News like central banks decisions and financial crashes do not seem to hit crypto until after a while.
Not sure how you came to the conclusion that news doesn't affect the crypto market. I mean when the news came out that China has banned the crypto mining, there was utter chaos within the crypto holders and traders while the price also went down. When the announcement and news came out that Tesla no longer accepts Bitcoin as payment, the price was pummeled down badly, something we are still recovering from.
I actually think that news and small things affect the crypto market more than they affect the stocks market because the rumor spread through the community like fire and people believe each other even without verifying the news because bitcoin isn't centralized, there is no source to confirm the news either unlike the stocks market where you may have the ability to verify a rumor or news being spread.