Once the fascination with prespriction drugs will fade(and it will) the music and BPM's will go up again imo..the lifestyle that comes with a lot of the music is determined by it's demographic and the 15-30 group will lose it's influence on what sound is popping.I think that dancing,actual dancing,not cerebal palsy type moves will make a comeback and the music will follow suit..EDM is king right now,trap is a close second worldwide as far as influence goes but the BPM's will have to go up to have worldwide mainstream appeal.Trap as it is has too much of a limited appeal to dominate worldwide and cloud relies on mood/style over substance too much which makes for limited listening...but thats my take on it..