Why are shares in a company that used to be a biotech, which turned itself into a blockchain technology company, soaring this week?

Shares in Riot Blockchain Inc. of Castle Rock (Nasdaq: RIOT) soared more than 42 percent in Wednesday trading, and they were soaring again in early Friday trading.

Riot Blockchain used to be known as Bioptix Inc., and before that, it used to be known as Venaxis Inc., a medical device company.

Now it's Riot Blockchain as of last month. It's trying to become a player in the digital currency business and "a strategic investor and operator in the blockchain ecosystem with a particular focus on the Bitcoin and Ethereum blockchains."

Read more at the Denver Business Journal: http://bit.ly/2AtLhIw