No, I'm not increasing Bitcoin investment because of halving. If you check the bullrun history, the peak of Bitcoin price wasn't in halving but it happened few months after the halving. Halving is just a trigger for the peak of Bitcoin price, it is not the end of the price growth. However, there should be some people who set their target on the halving. I think it is no problem, each person has his own goal. If you are satisfying to take profits during the halving, you can choose the exit earlier.

Why you must asking this question?
Everyone probably has a different target, so they must hold for a different time duration.
I'm holding for 3-4 years. People who just bought Bitcoin this year, may hold for few months only. 
How about you, dude?