I believe it is both currency and an asset. But it is not good when a lot of people consider it just as an asset/investment. Or at least until it is widely accepted all over the world. The goal is to make it widely accepted even in the remotest place, to buy a coffee in Himalayas, in Nepal. In other words, the circulating supply should roar.
In today's date,crypto can be considered as an asset though it is a currency.This is because people hold their cryptocurrencies or bitcoin in order to gain profits.People also invest in cryptocurrencies so as to earn profits in short the short term.You have both the options.You can also spend it as a currency.You can also make some transactions through cryptocurrencies.