So converting it to Fiat, don't forget to contact a good accountant.  If he lives here in the US, he is going to have to pay capital gains taxes on that if he wants to cash out.  With $360,000 why not remodel his/your home with a nice server room.  You could have a nice electrical system and cooling system upgrade, drop in 30k worth of new, more efficient miners, and pay a few months worth of electricity bills.  Start it up as an LLC and then use the new miners, "home office" remodel and upgrades, electricity bills, mining fees, ect as tax deductions for years to come.  Have an income generating business with free whole home heating.  Hell, you could put in a solar panel system and minimize electricity you need to pay for.

And then have enough left over to pay off/down mortgage, other debt, and take the family on a nice vaccation.