Of course, there is, since we already experienced the first and second Bitcoin halving event.
It might help you, Bitcoin Halving, Explained

I understand the essence of halving and how it may become an advantage to me and other investors. Though it already happened in 2012 and 2016 as expected everyone considered it profitable to themselves. However, for this year that we are close to the halving, we are seeing that the price of bitcoins is shaky though, it is already obvious that bull run has taken its place, and that for me doesn't guarantee that same thing will happen again like in 2012 and 2016. In fact, I must admit that right now I don't do any action like selling or even buying a bitcoin because for me even the scenario has already been tested before still there is no guarantee on what will happen next after this halving.