i also played since day 1 on my other account thay i have no longer. i remember everyone having the same cards due to the fact there was only one or two boxes out. and nothing really special. so im with u on how tf they got so many
I could see it being a realistic number if you buy packs (with RL money) fairly regularly.
Also worth pointing out that certain events are very, very grindable for R Jewels to upgrade cards with the Card Trader, which adds up. I personally have 107 Prismatics, but then, I also have 1100 Duel Orbs and like 180k Gate Keys + 30k of each coloured one, so could grind a lot if I wanted to.
...Damn it. Now that I said all that, I totally want to try for the 200 Prismatics. >.> Probably not going to try that hard, but eh, might's well grind the Gate more than usual for a while and see how I go.
I got the 100 prismatics icon in exactly 1 year and I am a f2p player. I got that one in February 2019, and I just got my 160 prismatic so yeah, it takes a really long time w/o money. Although I haven't used the Card Trader since I got the 100 icon and I have 50k R Jewels in stock so if I wanted to I could get 20 more prismatics.