Bitfinex has been playing cat and mouse with banking for years. Even before Wells Fargo blocked their wires, they were in a nefarious banking situation. Bitfinex never wanted to take it slow and get themselves legal in the eyes of the US.

This approach would work if they were much smaller. If they just had $100M under management or something, they'd probably be able to operate in their sketchy way. They'd need somewhere safe to keep $50-60M, then they could take a diversified risk with third party processors to move money to clients.

But Bitfinex is just massive. They have billions under management. It's just not possible to hide these amounts of money when you are banned from the banking system. So yes, they should have shut down when Wells Fargo put the nail in the coffin. But like I said, by this point Bitfinex was already accustomed to opening new companies, new banks, hiding money and obfuscating its nature.

For them it probably wasn't even considered. They just kept trying to move huge amounts of money around, but from what I understand, there have been multiple instances where their money has been frozen, seized, or outright stolen by third parties.