I do not think that cryptocurrency can completely replace fiat, but the current crisis reveals the many problems of existing systems, which in itself pushes us to use alternative methods, such as cryptocurrency.
The worse the condition of financial systems will be, the higher the likelihood of people using cryptocurrencies.
Sorry, but it was not as I've looked into the market. The situation may reveal that people are now conserving more on fiat rather than adopting cryptocurrency. People have their options, we are supposed to think that during these hard times people will go for crypto but it happens that they are converting it into fiat. Then it was clear to think that crypto isn't the first option but instead, they will consider this purely as an investment.