package, only available from stretch-backports, however that version may be outdated, dysfunctional:
Not as simple as just installing the package.
Tails design documentation:
Tails user documentation:
Existing Whonix documentation about electrum:
Electrum Bitcoin Wallet in Whonix ™ Development Notes:
Criteria for installing applications by default in Whonix:
Policy for Inclusion of Compiled Software: