This is just a friendly reminder that come 1.9; which comes out June 27th, the following World Event Currencies will be obsolete. So make sure to spend these currencies before the update comes out if you still have any left.
Also starting the next update after 1.9, Dragon Tears and Magma Opals will be obsolete.
Unique Snowflakes, Glass Beads, and Carnival Prize Tickets will always remain useful, and will have their description changed to let you know they are an annual currency.