smaller ports should think "short term" for tying up cash. For a $5M port to buy a movie like HPOT8 when it IPO's is fine... take the 'ride' up in price, but then sell it off and use the profits to continue to build the port. To tie up lots of $ to hold an IPO through it's opening if foolish, in my opinion, since it ties up your cash, and you can make a lot more $$ by playing openers, bonds, etc., in the meantime.
There are many trading styles here...and they ALL can work. It just depends on whether you want to build your port slow and steady over time, or faster and bigger over time. Playing openers is perhaps the fastest way to build your port (holding them correctly, of course) but it IS riskier to play them, and you have to be willing to lose $$ on ones you hold wrong... but still, it's hard to beat the amount of $$ you can make in 2 days by playing openers - riskier, yes...
So, whatever playing style works for someone is great, personally, I just feel that tying up lots of $$ for movies opening next year is not as wise for smaller ports. They can make much more $$ between now and next year with other playing styles... that's all. But whatever someone is comfortable with is the important thing.
It just depends on whether you want to build your port faster, or safer.