Guild Wars 2

I have saved many skill scross, (500+) and I am wondering of the updates before HoT launch will make them invalid. Is it wiser to use them now? or will they transform to hero scrolls? also I heard that You will make a new currency for currently skillpoint bought items, will the scrolls give 1 of those currencies? I would really like to know what changes this will bring and what the best option is for my scrolls before it is too late.

It doesn’t matte what you do. Extra skill points will be the new currency. Skill point scrolls will give the new currency.