Everyone on Wall Street has gotten a little too excited about a 'game changer' technology

You may have noticed that Wall Street has gotten pretty excited about blockchain. 
Blockchain is the technology behind bitcoin. Wall Street wants to use blockchain to simplify the way it processes transactions. 
It promises to improve security, lower costs and increase the speed of transaction settlement. You can read a fuller explanation here. 
Goldman Sachs says the technology "has the potential to redefine transactions" and can change "everything."