Lets look to "Valise" in a different way.
Valise in Life: a small traveling bag or suitcase that you can put your things.
Valise in Crypto: a virtual bag or suitcase with encrypted security protection that you can put your virtual assets.
Valise in French: Valise
Valise in Spanish: Valija
Valise in Turkish: Valiz
Valise in Greek: βαλίτσα (pronunciation is very similar in English)
As you can see Valise is an international word that many languages have it with little different nuances. So I am still think that Valise is a good choice. However, you are the developer and you are the one who make this decision. GreenWallet is also a good choice but as I said before it is standard or casual. I mean I do not think that GreenWallet takes people's attention more than Valise. Best!