I found their name to have been outlived by the specs of their service offering. Transferwise is about much more than transferring money these days.
"Wise" is very generic, and worse my guess is that they'll have a hell of a time defending that trademark.
But with Wise, for example there is already a MoneyWise, BudgetWise, etc., so "Wise" by itself may have issues with those other existing businesses.