Unable to request Kin amount

[zfedoran]

Creating a button for payment of Kin results in an error due to an internal conversion issue.

Steps to recreate:

      const options = {
        currency: 'kin',
        destination: 'E8otxw1CVX9bfyddKu3ZB3BVLa4VVF9J7CTPdnUwT9jR',
        amount: 67890.28,
      }