Cryptocurrencies are used not only for speculation, but also for investment purposes. Especially for investment purposes, diflationary coins are popular, whose issue is limited and the total number decreases over time.
Cryptocurrencies are showing good growth, deflationary coins with a limited supply are especially popular now. People buy deflationary coins in the hope of their further growth due to the limited supply.
Until now, cryptocurrencies are mainly used for investment purposes or for trading. And for these purposes, it is important that the cryptocurrency is deflationary in order to increase the demand for it.