Safe? Not necessarily...it's a stock, and a tech stock at that. And one that's seen a huge run-up over the last few years.
You don't have to go that far back in history to find the day that Apple's stock price dropped by 50% in one day. Could that happen again? Sure, but those of us who own Apple stock certainly hope and think it won't.
A site full of Apple enthusiasts isn't really the best place to look for investment advice.