title ye not
I' m not expert, but my thoughts lie with it being a long term investment, but there in lies the chicken and egg.
As the company performs well, its stock becomes more lucrative inviting people to purchase more and more shares in the company.
The more shares you buy, the more your lock in with Apple, given they pay no dividends. So if you want to get your money back, your only option is to sell shares.
If your a big shareholder and you're seen to be selling up, it makes other investors jittery and the too start to get nervous about their money.
the more people get nervous, then the share price starts to decline.
Id imagine its a similar instance to a 'run on the bank'
people can only get their money back if they sell shares, but if they sell shares, they could turnabout an end of the $40 share price and potentially apple itself.