I did a recheck on the Morse code.
Using the following suggested site for translation
The character that could not be translated : "---." stands for "!" according to this table.
this translates the last series of columns after "THEY CANNOT ATTACK WHAT THEY DO NOT SEE"
ISTOPW
ORDS T
LWG ! NY
AEFDMH
THMETNY
TWTEWTPOE
KEUEAL
ENEDLAW
Still brewing on the BTC transactions sequence...
[0.00404][0.005]@O[0.0009]#CHCKUSER[0.00404]!DO!!!"DONOT"HTTP
I translate the 404 to --> Not found, possibly indicating we did not find the (complete) clue.
The 0.0009 is strange, its is not binary due to transaction fees and the "9" seems to be right shifted one digit too far to indicate a number.
coinartist seems to have vanished from all kinds of social sites. --> checkuser?--> not found.... cannot attack? Do not see?
Using Google cache a transcript of her last twitter post can be found, referring to this puzzle.
dimensions are mentioned (23" * 36") (first columns then rows... it could have been a hint....)
Link to the source is mentioned. "i.imgur.com/Uc6VAnV.jpg"
Could do with a new hint thought, riddles are not my thing...... and a couple of restful nights and productive days... :-)
Using the following suggested site for translation
Just a reminder this is out there for translating and manipulating Morse... http://rumkin.com/tools/cipher/morse.php rumkin has many many other useful tools for these types of puzzles as well. 
The character that could not be translated : "---." stands for "!" according to this table.
this translates the last series of columns after "THEY CANNOT ATTACK WHAT THEY DO NOT SEE"
ISTOPW
ORDS T
LWG ! NY
AEFDMH
THMETNY
TWTEWTPOE
KEUEAL
ENEDLAW
Still brewing on the BTC transactions sequence...
[0.00404][0.005]@O[0.0009]#CHCKUSER[0.00404]!DO!!!"DONOT"HTTP
I translate the 404 to --> Not found, possibly indicating we did not find the (complete) clue.
The 0.0009 is strange, its is not binary due to transaction fees and the "9" seems to be right shifted one digit too far to indicate a number.
coinartist seems to have vanished from all kinds of social sites. --> checkuser?--> not found.... cannot attack? Do not see?
Using Google cache a transcript of her last twitter post can be found, referring to this puzzle.
dimensions are mentioned (23" * 36") (first columns then rows... it could have been a hint....)
Link to the source is mentioned. "i.imgur.com/Uc6VAnV.jpg"
Could do with a new hint thought, riddles are not my thing...... and a couple of restful nights and productive days... :-)
23 going down 36 going left
I also thought that we are looking for a clue that will lead us to a URL but the http 404 transaction suggests otherwise.
More like you will get nothing there....