Is bitcoin being used mainly as currency ? I see people using it as an investment medium. Everyone wants to get paid in bitcoins but no one is ready to pay in it. People are not ready o spend their bitcoins and are thus accumulating it. Reason is that there is tremendous growth potential in terms of prices.
Basically nobody uses it as currency, and calling it an investment is speaking way too highly of cryptocurrencies as well. These are highly speculative assets, hardly a wise 'investment' really, more akin to gambling. Good if you have extra money you don't mind losing, but make sure that you have your actual investment portfolio in check before diving into crypto.