The "huge corporations" are only taking advantage of the laws they had put in the IRS code for their benefit and anybody else lucky enough to come across the information (usually through a tax attorney). 

They can be very complex and some a so simple I often wonder why more people don't do it.

To make a point, in the USA corporations are equal to humans in law. But I say they are even better because you can move your corporation, trust, LLC or whatever to any legal jurisdiction on planet earth.  Like a human would move to another country.  Once your company resides in a crypto friendly jurisdiction then you begin to comply with their tax laws and you are no longer subject to IRS taxes.

My companies reside in a jurisdiction that taxes any crytpo profits at 0% as long as it is incurred in any other country on the planet or of planet as the case may be.

The companies purchased and own the crytpos so their is no tax due to America IRS authority.

So, as you can see the better method is to have your company purchase the crytpos to start and avoid the IRS all together. 

this is one of the more basic strategies to minimize taxes IN THE USA.

This is free internet advice so please do consult with professionals, I can only relate my experience in this matter, which is considerable.