Yes, most of us admit bitcoin is a superior currency because of the efficiency and usability of blockchain technology. But some people call bitcoin as a property. they have their own reasons or that they have invested bitcoin with their own assets such as selling gold, cars (material). In addition, bitcoin has the highest value and position in the market. Therefore, I think to give the concept for bitcoin a currency or property is perfectly reasonable.
yes I agree with you, that bitcoin is arguably an asset, because some people buy btc from their possessions and invest it for the long term, and will be taken whenever needed.
even most people invest to make huge profits.