Does God send you messages?

I had a dream in which God sent me a message to read the bible. So if God has the time to spare to tell me to read the bible why does he not send messages to people to warn them of danger, e.g dont walk though the park tonight you will get murdered?
Update: Socko...It was but a dream, I'm not claiming to speak to god, just mentioning a dream. Why would I lie?
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