you are right mate. before the halving there are so much expectations like that the price of bitcoin will be double or it will decrease twice but really nothing much happened. it just stabilized its price at around $600 to $700.
it's a predictable event -- traders and investors alike see a supply drop incoming, so it gets priced in. the real supply effects may not be felt for years (remember, only a very small % of bitcoin gets traded on exchanges -- chinese exchange volume is fake). so we could actually see the price drop for some time as traders don't see the expected pump in price post-halving.