bitcoin               
                                        
                                          
 bitcoin  is  a crypto coin,  crypto here 
 meaning "hidden",  because this money is 
 invisible, intangible (yet still real)!  
 this  is a  symptom of it only living on 
 the internet  -  in fact, if you were to 
 remove a bitcoin from the  mainframe, it 
     would immediately die and become     
                worthless.                
                                          
 it  works like this:  if  you  make your 
 computer  create  a  lot  of  heat, it's 
 rewarded  with  bitcoin,  as a token  of 
       gratitude from time's arrow.       
                                          
 then every  other computer has to sign a 
 document  stating  that those  coins are 
 actually yours. you  can then  send them 
 to  others, generating  a  new  document 
          for everyone to sign.           
                                          
 and because you're  knee  deep now,  you 
 have  to   sign   a  lot   of  documents 
 yourself, and  keep track of who  signed 
 what,  and look for  forged  signatures, 
 and  probably forge  a  few  yourself... 
                                          
 also,  in  the  end  it   doesn't  work.