Bitcoin and other popular cryptocurrencies are the ones we hear about most, but there are about 17,000 virtual currencies out there right now, if I'm not mistaken. It only takes a few minutes for someone to create their own cryptocurrency. That means the landscape is constantly changing, so we need to adapt. It's so easy to create a new cryptocurrency that it makes it tough to enforce the act.
On March 7th, 2022. See this statement in context.