Is the jumpy start bundle a good purchase to fill in golds for collections?
Not really at this point. It was for like the first week, but if I recall, it's 15K for 5 golds? You can pretty much buy and 5 golds for less than that.
Pretty sure you could buy the most expensive gold card five times for less than the cost of that pack. It would basically be like throwing 10k away at this point.