If the world starts to have an economic crisis, it will devalue the fiat currency in everybody's hands. Then people will put money into bitcoin, because more people recognize bitcoin.
Rapid Bitcoin development makes people believe more in this digital currency so it is not impossible that there will be more people exchanging fiat with crypto because of the global crisis. but before that everyone must realize that Bitcoin also has the potential to fall, especially when there is a global crisis so be patient if you hold the crypto.