It's called mass-posting. Not much value in the post, but catchy headlines and images create high volume of comments and upvotes.
Also, crazy predictions with little fundamentals (e.g. if this cross this limit, then an upside of 1-gazillion-percent is in the near future) will always get attention of the untrained eye.
RE: CANNABIS COIN (CNN) KNOWS HOW TO Go HIGHER and KILL POVERTY!!