There is no doubt that there was a rise in price of BTCitcoin during every halving event but the main thing you have to notice that the economic situation globally was not stable and the during the initial phase it was well after the recovery phase, but if you access the global economic situation right now it is not that great and if there is a financial crises then these predictions might not happen, there are many factors right now including regulatory talks and other factors and these were not the case during the past halving and hence you cannot always expect the same when these factors change.