Im thrilled to have bought the vast majority of my Apple shares, in the years where it was only approx $20, $30, & $40 per share. Now I can weather the ups and downs without concern. If if really begins to collapse I'll sell and still walk away smiling
I would walk away smiling right now, if I were you. The days when Apple was $20 a share would, if you purchased 3000 shares (as I did), net you close to $2 million. That's not really a retirement fund, but it's a step in the right direction.
Otherwise, the words of Benjamin Graham are sage advice (which I have memorized since the crash of 2000):
"An investment operation is one which, upon thorough analysis, promises safety of principal and an adequate return. Operations not meeting these requirements are speculative."
"and" is the most important qualifier here... Either you are an investor, who, through aggressive research rather than aggressive (read: haphazard) trading, seeks both safety of principal and an adequate (not irrational) return, or you are a speculator who listens to the wind and reads the tea leaves, chasing high returns without regard for protection of principal... the absence of the latter of which will completely destroy your portfolio.
Apple as a company is not any longer dependent on Steve Jobs for its success, but the speculation-driven price of its stock is very dependent on Steve Jobs and the brand perception is inextricably linked to his image. They'll continue to thrive, most certainly, as a company well after he is gone, but the "sex" factor of the stock which makes it valued at over six times book value (which is astronomical even if you account for discounted cash flows five quarters forward)... $320 a share is a ludicrous price to pay, and institutions know this—but they couldn't make money out the other side if they told you that, so they don't.
My advice is to take your earnings, be shrewd, and diversify into real investments that have a reasonable rate of return. Chasing after abnormal returns is extremely foolish for a very simple reason: Any number times zero is still zero. Invest in something with a reasonable and relatively predictable return, sit on it, and let compounding interest work its magic over time... and you will come out ahead, way ahead, of the morons who periodically keep vaporizing their principal, resetting the counter to zero, never bothering to calculate the effects of those losses compounded over time.