No 3 btc encrypted_key, no interest   

    all wallets are scam!
     You check your wallets with pywallet tools  python pywallet -d -w wallet.dat
     You will find the keypool time is incorret.
     for example 18NxttmXTJfifBJCeJnJYTVvTniR5hZRBB  75.2 btc
     the keypool is:
     "pool": [
        {
            "addr": "1N7nnUeJEmRdUCjUFSgoZSWn6cqNmyPPvc",
            "n": 1,
            "nTime": 1513148460,
            "nVersion": 80500,
            "public_key_hex": "029621dc737db8e74cfdb75e94a1ef5f7c266d62a200f97607074a549c943c9241"
        },
        {
            "addr": "1FgTU13mAVJenBLTGeqXQuEj3ZAFEt9q2s",
            "n": 2,
            "nTime": 1513148460,
            "nVersion": 80500,
            "public_key_hex": "0231b7eb1c9eb9aaed4bd19759c54120767a0cd1ac07ff65299b59ee5a6294274e"
        },
       the nTime is modify password time,
      I  buy this wallet 2017-12-30  the modify password time is 2017-12-13
      password is forgot after two weeks, so the wallet.dat is scam
   

  All wallets are scam.
  Please use pywallet check keypool timestamp and version.

  for example

   "pool": [
        {
            "addr": "1N7nnUeJEmRdUCjUFSgoZSWn6cqNmyPPvc",
            "n": 1,
            "nTime": 1513148460,
            "nVersion": 80500,
            "public_key_hex": "029621dc737db8e74cfdb75e94a1ef5f7c266d62a200f97607074a549c943c9241"
        },

   the nTime is the password modify time.