∞/21m but so many have been lost over time it’s fair to say ∞/16m

∞/21m but so many have been lost over time it’s fair to say ∞/16m ~ Few

BlackRock’s (BLK) Bitcoin (BTC) ETF Application Takes Market Surveillance to the Next Level

The nuance here can be characterized as the difference between push and pull. The SSA concerns data surveillance carried out by the spot exchange, Coinbase (COIN) in this case, which can be pushed to regulators, ETF providers and listing exchanges if deemed suspicious. Information-sharing agreements, in contrast, allow regulators and ETF providers to pull data from the exchange.
An important caveat is that an information-sharing request has to be very specific, not dissimilar to a subpoena, according to a person familiar with the matter.
“It can’t just be a fishing expedition, where it’s all of the information attached to any trade that was made between two given points in time,” said the person, who asked to remain unidentified. “The obvious concern is that crypto traders, almost by definition, don’t like having information shared about them. It’s sort of anathema to the ethos of crypto in general. But for the ETF to be successful, [firms] have to do it.”

BlackRock Bitcoin ETF could unlock $30 trillion worth of wealth, Bloomberg analyst says…

Silk Road–Linked Bitcoin Worth $300M Moved by U.S. Government: On-Chain Data
Two wallets tagged as belonging to the U.S. government and linked to the Silk Road seizure of crypto have moved over $300 million worth of bitcoin