Amna Nawaz:
In the up-and-down world of cryptocurrency, so-called meme coins are perhaps the most bewildering. The joke-inspired digital currency is all over the Internet, with new tokens popping up every day by the thousands. The value of some has jumped into the millions of dollars thanks to viral trends or celebrity endorsements, but most never take off, crash or disappear.
So just what is a meme coin?
Economics correspondent Paul Solman explains.
