Bitcoin was used as a digital currency since from the start. But this become a failure because there's a problem regarding on mass adoption and government acceptance due to its features. But still bitcoin had achieved an increasing value when some other countries are starting to use it as a mode of payment for commodities, services and some converted it to fiats. Due to its high market value, bitcoin was already considered as an investment and asset. They used as an investment because bitcoin has a huge increase of value every year. Big investors come and buy a lot of bitcoins in the market for the profit they can get from it. Bitcoin with its features made itself as an investment nowadays. And we have nothing to do when crypto community already call bitcoin as an investment.