For more information concerning Bitcoin (other than the Motley Fool articles that I posted a few minutes ago), I recommend reading the Wikipedia article at https://en.wikipedia.org/wiki/Bitcoin. Technically, Bitcoin is an “application” of so-called “Blockchain” technology. Of course, I wish that I would have had the foresight to have purchased (for that matter, even “mined”) Bitcoin starting back in 2009, but such is the nature of uncertainty – what may seem “obvious” now seemed borderline silly back then.
The level of volatility in Bitcoin spot and futures prices can be quite breathtaking at times. Indeed, daily volatility of Bitcoin is roughly ten times the daily volatility of the SP 500 stock index (see WSJ Daily Shot, 11-January-2018). While there may be some entertainment value in buying and selling cryptocurrencies in the spot and futures markets, these instruments are clearly not suitable for most investors.
For more on Blockchain, I recommend watching either NYU finance professor David Yermack (cf. https://www.youtube.com/watch?v=Irc-VMuUs3c) or Duke finance professor Cam Harvey (cf. https://www.youtube.com/watch?v=G1tVnXTcDBU) – they are the best of the best finance experts on this topic.