The IRS deems cryptocurrency to be property. The SEC would likely identify some ico tokens to be securities
The following are not able to be used in a Section 1031 "like kind" exchange
Inventory or stock in trade
Stocks, bonds, or notes
Other securities or debt
Partnership interests
Certificates of trust
But, bitcoin, litecoin, ethereum, are clearly not securities, but rather digital assets that provide for a participation right in a particular economy or market
Thus, could one defer speculative bitcoin trading gains in a Section 1031 exchange?
*maybe* is my thought, but perhaps a tax expert can weigh in:
https://youtu.be/D6Crr-Ov2Cs**not tax advice, of course