Every now and then I like to take an online course. Especially when they are free ones and especially the ones that many people have suggested to me. Luckily enough, one course happened to fill both criteria and looking back to it now I am very glad I took the course.
In recent months (and throughout its history…) there have been huge fluctuations in the prices of cryptocurrencies. There are two intriguing aspects about the recent price changes (Jan-Feb 2018):