Facebook's Libra payment system could become a serious competitor for Bitcoin. This will happen if the US authorities legalize the companys token.
I think even despite possible competition from Facebook, Bitcoin will continue to grow in price and develop as a technology.
halving will become one of the drivers of Bitcoin value growth, but it is unlikely to increase many times over. Reducing the remuneration for cryptocurrency mining is a well-known event, and its expectations have partially already affected the price of the coin.
everybody knows that after halving bitcoin price might increase. but if it happens, it will only be temporary.