The next halving is in four years from now (approximately).
There is no telling what will happen with Bitcoin in the next four years.
Maybe its a safe investment and you will double your money, or maybe some other coin will take over and Bitcoin will be dead.
If anyone can predict what will happen in the next four years, please let me know so I can make some money with good investments!
All of that experience something extraordinary if doing so (halving). However I am not sure if the growth of the bitcoin will either 4 years, because I see right now is still very little user bitcoin which contributes best to bitcoin, so I also think that halving is not the best way because it has a greater risk if can't do it well