Up until now, capital gains tax was only due when you CASHED IN your crypto for dollars or another fiat currency. But now EVERY crypto trade will be subject to a capital gains tax.
Every CPA I talked to said that all crypto trades has always been a taxable event. The tax bill clarified that like-kind does not apply to crypto which does NOT mean that it applied in the past! Nothing has changed except they made the words more easy to think about.
RE: LOOPHOLE for the New 2018 Tax Law that Taxes All Cryptocurrencies in US