• electrum need to be used only at the spending time
  • the method described above the public key and the private key is generated offline
  • whatever amount of bitcoin is kept in this account the private key never got connected with internet - it is only in the form of a printed paper
  • private key is exposed to internet only when it needs to be spent
  • useful to store higher value of bitcoin for a longer time span - for regular use other methods may be best