How can I dump my bootable ssd to inspect the dump in HEX editor
Since you are booting into recovery, you will need to decrypt it first using diskutil

diskutil coreStorage decryptVolume /dev/disk1s1 -passphrase ThePassPhraseYouSet 


It will then decrypt the volume.

Per the man page (man diskutil) :


  Begin a live background process of decrypting the on-disk backing
  bytes of an existing encrypted CoreStorage logical volume (LV).
  Bytes are read, decrypted, and written back to disk in plain form.  The LV must be unlocked before beginning this operation.


You will have to unlock first...

diskutil coreStorage unlockVolume


Once it's unencrpyted, you can then use dd to dump it to an image for later manipulation:

sudo dd if=/dev/disk1 of=/path/to/disk.img