I have been through a couple of Halvings before and I can tell you with all honesty that the impact is not very significant. Yes, an event like this gets some media attention prior to the event and this leads to some new people investing for the first time and some older investors buying more coins, but it is not significant at all.

On the date of the Halving, most of the impact is already priced in and as the hype subsides, everything goes back to normal. You can capitalize on the small bump in the price, prior to the event, but you will have to invest a large amount of money to show a significant profit.