Options are a zero sum game between the options holder and options writer. Covered call writers lose gain by having his positions called away at below market price. Naked call writers have net losses.
I don't usually like options. I only play options occasionally when I strongly feel it must be a bottom or must be a top. I held no option before Dec. 10 and purchased the bulk of call options I now own on Dec. 11. The problem is out of money options are often times gambles, and in the money options gives you no leveraged buying power.
Why do you buy $2.50 call options today? With the same amount of money you can buy more equity shares using margin.
Why do you buy $5.00 call options? You pay the premium and get nothing get. At the end of day you still need to pay $5 on top of the premium, to acquire shares. You can just buy shares today for cheaper, and hold and let the position grow.
Why do you buy $7.5 call options today? You pay the premium and still need to pay $7.5 in the future to get the shares. You can buy the same share today without premium, and far cheaper than $7.5.