Seeing that I have a pretty big coin collection and I am invested into bitcoin I knew I needed to buy this. In so glad I came across these «coins» on Amazon. I ve got a kick every time my friends open the package, and see them smiling. Bitcoin Exchange Definition A bitcoin exchange is a digital marketplace where traders can buy and sell bitcoins using different fiat currencies or altcoins. Leigh Cuen Dec 13, There are no design flaws or inconsistencies that I can find. Cool gift for those interested in Bitcoin and those who think they are not.