We all know total supply of bitcoin is 21 million but why Satoshi Nakamoto choose 21 million figure for total supply of bitcoin?

Chairman of U.S. Commodity Futures Trading Commission (CFTC) J. Christopher Giancarlo holds that regulators need to avoid inhibiting the innovation technology brings. https://bitcoinist.com/cftc-chairman-no-harm-regulation-crypto/

New york based Citi bank will offer crypto custody solutions to institutional investors, it will provide institutional investors to invest in cryptocurrencies in a fully insured and regulated manner.  Link : https://www.ccn.com/citigroup-is-the-latest-bank-to-offer-crypto-custody-heres-how-it-will-affect-the-market/