Youv'e brewed 7 batches and never seen a krausen (the foam generated by fermentation) before? Or is this just an unusually large amount? Many fermentations can be very active and make a lot of krausen- many people use a blowoff tube to prevent the airlock from clogging and blowing the top off your fermenter, getting beer foam everywhere. It will eventually settle- most all fermentations produce at least some krausen. No particular need to use a secondary with this beer rather than any other beer, but if that's something you like to do it's not going to hurt anything. I typically don't secondary beers unless I'm adding something post-fermentation like hops, oak, or fruit, but that's a personal preference. Some people say hop aroma compounds can bind to yeast and so it's better to have clearer beer with less yeast in the carboy when dry-hopping too. Secondary is good for that.
I can't be arsed to keep up this list of what's in the fermenters, but hey, check out the cool brewery I'm opening up!
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