By Paul R. La Monica, CNN Business
Bitcoin prices have been on a wild ride this year, and they are set to finish 2021 sharply higher than where they began it.
So what’s next for bitcoin and other cryptocurrencies?
There is no denying that crypto has gone mainstream. The total value of all cryptocurrencies in circulation stands at more than $2.2 trillion, with bitcoin accounting for about $920 billion of that total.
Ethereum, or ether, is starting to close the gap, too. Ethereum, which is a popular crypto for the smart contracts and non-fungible tokens (NFTs) that have taken the art and collectibles world by storm, has a market value of $475 billion.
Ether prices have…