Well, it appears from what I can find no account of him using money, most of his support came from others donating to him, or from divine intervention.
It appears from scripture that Judas was in charge of Financial Matters, most likely The Tyre Shekel, or Denarius (plus a few others).
However, it's fair to assume since Jesus had divine blessings, that we can use other Prophets to examine The Most "Holy" Currency.
One that is probably backed by silver.
Further readings if you're interested.
John 12, John 12:6 more specifically that mentions Judas as the treasurer, though the context of John 12 helps.
Coins used during The New Testament:
https://www.bible.ca/coins/bible-coins-Jesus-used-in-the-New-Testament.htm
Coins used by The Ancient Israelites: