CNBC, Telegraph and BBC are good because they're easy to use and brief. Some sites like bloomberg are lag heavy and sometimes information heavy. FT is also very good but expensive.
But these are for stock and forex trading and also for commodities like gold and silver trading. For bitcoin and altcoin trading we must need to follow crypto currency based news and magazines for quick update.
For altcoin trading, we just need to follow this forum for any perfect decisions because no one will be able to get chances to cover up latest news other than bitcointalk on altcoins.