Here is a Bitcoin on the 'blockchain'!
This fun chain looks great when printed on my Lulzbot Taz 6. The bed size is rather large so you might have to scale a bit to fit your bed.
Supports are necessary! The supports hold the links just enough apart so that they do not fuse together and prevent the chain from being flexible.
I used Push Plastic's Gold Metallic PLA: https://www.pushplastic.com/products/pla-filament?variant=13534674055
Thank you 'FLOWALISTIK' for the base model i used for the coin part: https://www.thingiverse.com/thing:2595156