Guild Wars 2

I have a tri keys but tri key chests is gone so what do i do with it ??

2 options

Save them for next year (if the event or chest comes back or earlier, you never know for sure).
Or destroy them (or sell, I don’t now if you can).

Not sure if they’ll be back. The Tower LS is over, and we’re in the process of finishing Scarlet. If she’s gone, the chest probably will never come back.