Token transfer can be paused. Valuable to prevent trades until finally a interval or freezing all token transfers. BTC addresses use Base58 (like Base64 but without the need of similar character: IOl0+/) and must start with both 1, 3, bc1q or bc1p depending on what sort of address it is https://vanity-generator93186.vidublog.com/28637432/not-known-factual-statements-about-ethereum-address-generator