Assuming run rate revenues of around $2.5B, I assume this will be valued around 15x revenues, so $37.5 billion. Just a wild guess.
If by some miracle Wish gets 15x, they'll be a spectacular short opportunity.
But Wish is in a retailer vs Shopify as a platform. I Highly doubt wish has the same value. In fact, I don't know a single instance of someone shopping wish and being satisfied. Someone will buy it, it'll probably be way over valued, and it will eventually drop back.