I will obviously never receive the value of these coins but there is no way to prove I didn't just transfer them to another private wallet and sell them at some profit. There doesn't seem to be any way to record for tax purposes they were stolen. Is there a tax risk here?
if it was a PONZI scheme, you are probably entitled to a casualty loss deduction. you may want to consult a pro to see if you loss is a loss from a Ponzi scheme. alify. A pure theft probably doesn't qualify as a Ponzi scheme. Don't think Coinbase reports purchases. only when crypto is sold do they report sales and cost to IRS.