The only thing I am concerned about is "paper bitcoin" and rehypothecation. Is there anything published about how ETF entities might prove they have custody of the amount of bitcoin they claim (in other words, proof of reserves)?
With ETFs, you don't need to be concerned with reserves. I can buy the ETF, go to the market-makers, and ask them to exchange the ETF for either bitcoin, or a cash equivalent. If they can't deliver, they're in trouble. There's a two way arb in ETFs which keeps the price tracking accurate: - if the ETF trades higher than bitcoin on crypto exchanges: the market makers can simply buy bitcoin on exchange, sell the ETF on…
How are you protected against losing your investment if they can not deliver?
> Price tracking
Does Bitcoin support a high enough frequency of transactions for long enough to make this possible for years into the future? Does it not become too hard to mine at some point?