The causes include lack of stability in other markets, institutional investors like hedge funds, as well as the ‘safe haven’ nature of Bitcoin as an investment.
Menant said:
https://cointelegraph.com/news/bitcoin-price-will-reach-5000-this-year-gatecoin-ceo-aur%C3%A9lien-menant
He mentioned many reasons and made a very obvious prediction, even someone with a low IQ like mine can make a prediction like this
He should make a prediction that was some news, at least I've heard predictions of 7000 and 10000 for that year.