Does anyone know how many bitcoin GBTC holds? Can they prove that they have that amount? Is it in line with the fund's market cap?
Market cap is 1.63x the underlying bitcoin, that's why the Sweden and Stuttgart ETNs I posted about are a much better value, near zero premium instead of 63%. As for them "proving" they have that amount, I don't know and it is a good question! I do know that their holdings are not insured, so futures imo are safer (as well as being basically premium-free).