Because this has the backing of some pretty big names in BTC. Roger Ver(Early bitcoin investor), Jihan Wu(Cofounder of Bitmain. Leadin ASIC manufacturer and Pool operator.), Craig Wright (Claims to be the real Satoshi) and many others. With that kind of clout backing this coin, it got listed on many exchanges with relative ease.
Satoshi, not so old, wants to play again ?
after all, he is the principal responsible for all this giant move.