@Yield Guild Games #YGGPlay $YGG Bitcoin combines a number of existing technologies that have been around for a long time, and this includes blockchain technology. The use of such immutable data structures can be traced back to the early 1990s when Stuart Haber and W. Scott Stornetta proposed a system for time-stamping documents. Much like today's blockchains, it relied on cryptographic techniques to secure data and prevent it from being tampered with. But Bitcoin was revolutionary in solving the double-spending issue that plagued other digital payment systems at the time