How to i have it? In my deac i dont remember getting it
Also what is it.

its for this:
http://forum.toribash.com/showthread.php?t=592242

basically,at 15th of May every player that had at least 1k got 1 coin for
the next game,so if you had 100k you got 100 coins and so on.

Nah, everybody got 1 coin, it's just the value of the coin that is different for everybody.
Once tb next is out we'll be able to use this coin to get tc there.

half true,it is one coin,
but depending on the tc you had,it has different value xP

So i can get more?

i think it was a one time thing only.

Yeah, now the event is over so you can't increase the value of your coin even if you get more tc