Do I need a crypto wallet to sign up for Ambire AdEx?

You can also sign up for Ambire AdEx with no crypto wallet at all, only by entering an email. This way, an in-browser wallet will be created for you. However, we recommend using a crypto wallet, since the security is much better. If you sign up with an email only, you can always upgrade your account by linking a secure crypto wallet, such as Trezor, Ledger or Metamask.