Lmao btc is not a grabage and it is not worthless because btc is verry useful and it can be used for anything  . the real truth about the pump last year is because of the btc's demand  .  many people are becoming interested on it , thats why they buy and result for the price to sky rocket  . 

The dump in the price is also normal because people also sell their btc in order to get profit and maybe they cant buy  for now because they dont have a cash yet  but the price can surely recover next time if ever there were will be new buyers that will get attracted  to btc .