Why would you ever want to use an immutable public blockchain for such a transaction? Bitcoin is perhaps the most traceable currency in the world.

This is something I just don't understand about Bitcoin's value proposition.

> what's my other option?

I hear Oriental rug import businesses are popular.

> the challenge would probably be finding an exchange that would let you cash out that kind of money.

Even if, I hear the IRS is requesting transaction records from the major exchanges.