I think bitcoin is an asset,because the value of bitcoin keeps increasing.If you hold bitcoin for long time you can have more profit while you sell it.
Bitcoin is a currency and an asset, too. As you can see, you can use bitcoin for any purpose you like. You can use bitcoin to buy online stuff and if you are lucky, you can find a store in your local area which accept bitcoin. Bitcoin can be considered as a type of investment because if you hold bitcoin for a long time, 90% that you will earn a huge profit in the future.