With so many cryptocurrencies, why do any of them have value?
Many experts insist that so far cryptocurrenies, promoted in high-budget ad campaigns, are next to useless except for the purpose of getting rich on rising valuations. As examples proliferate, informed sceptics worry a nose-dive could destabilize conventional markets.Movie star Matt Damon has attracted unfavourable media attention for appearing in an ad for Singapore-based Crypto.com comparing…