There are articles about "bitcoin mining", whereby new bitcoins are introduced into the market. This involves something weird and complicated about "solving complex algorithms" which I fail to understand.
Apparently, one of its attractions is that there is an absolute cap on the total quantity of bitcoins available - 21 million or billion or something - which make it potentially attractive to investors when compared to real world currencies that are subject to quantitative easing etc - but as an investment vehicle, it looks to be highly risky except as a small- scale savings toy that one can play around with.....