I Made a couple of Bitcoin Signs out of 1/8 aluminum,  they are roughly 22 inches round and site a little bit proud of the wall to get a nice shadow behind them.     
if you interested,  hit me up    .013 BTC    (Including Shipping within North America)     If you live out side North America, MSG me I'm sure we can figure something out. 




Also if there are any ideas that you would like to see let me know and i can try to figure it out for ya