If an email with a number in it was a binding offer, then what is a contract for?
Edit: I see that you edited in an additional paragraph at the end of your comment after my initial reply. If you’re editing a comment after-the-fact, it’s good practice to make it clear for future readers.
A written negotiation about the purchase price is completely different.
B: Hey, I’ll buy this from you for $2500
S: No, sorry. But I’ll take $50000
B: Deal!
He did not say, “if you pay $50,000, I will sell it to you.”
In this case, Jump agreed to the price the person set, and then the person didn't give Jump the opportunity to pay. Where I live I'm pretty sure this would have been a binding agreement, though there's definitely some exceptions to that law that might or might not apply here.
There is a huge difference between buying a sandwich, and a claimed 5-figure deal. No one is going to sue over not being able to buy a sandwich.
If you walk into a car dealership and buy a car, you can be damn sure there will be a sales contract.
And note this was not an advertisement, it was a personalized quote.
Also while advertisements made in separate channels (like on TV) might not be binding, at least where I live any advertisements made in the store are certainly binding.
"personalized quote" implies that the owner here took the time to look into the prospective buyer, and determine an amount that was based on that buyer.
It is not in any way, shape, or form reasonable to assume that the seller looked into Jump, determined that they have spent hundreds of millions of dollars on something called "Wormhole Network", and that 50k was what they would reasonable pay for "wormhole.com".
Trying to phrase this as a "personalized" quote is misleading.