The 51 BTC statement assumed the exchange rate would remain stable, not spike 5-10 times and set new records.
Prove it. Show the statement from HF stating such a restriction. PROVE IT OR YOU ARE LYING.
sorry to put salt on old wounds but lying is rarely legally actionable. If someone lies to you and it is obvious to a reasonable person then you can't rely on that lie and claim damages. The very fact that the TOS was directly oposite of those BTC refund marketing statements should've been a big red flag.