NEW: Jack Mallers states that his new Bitcoin acquisition company, Twenty One, will release proof of reserves.
https://file.nostrmedia.com/p/e8d66519e43b1214ac68f9f2bdbc4386d41ac66b20c5a260b9b0410278...
The Bitwise ETF does this, so it is possible. Choose companies that are true to Bitcoin, reward their transparency. https://bitbetf.com/