Bitcoin was first developed to be used in marketplace and shops. It is to make transactions easy for us as third might not be need in exchange for good and services transactions. However currently we are using it at investing tools just like stocks and commodities.
I consider bitcoin to be very practical for payment transactions, even though it is online and between countries because it is peer to peer and eliminates the role of banking.
But naturally bitcoin is also very suitable as an investment, both short and long term. This proof has taken place and has been enjoyed by many people throughout the world.
The true usage of bitcoin is that it should be used for the payments and it has a lot more benefits over the fiat currency. Currently mostly bitcoin is used to invest in it and gain profit by trading which is not the only purpose of bitcoins and crypto.
I still not use bitcoin in marketplace/online store.
Why I don't use in marketplace? because I am only a small person who buy something with small payment. And I know that Bitcoin fee quite high for small payment.
But if I as an online store owner, I would like to use it as one of the payment method. For big payment of course to avoid high fee
Well, the fee is not much that you avoid it for payments. In case you allow bitcoin as a payment method along with credit/debit cards, your online store will have much advantage as compare to the stores which do not accept crypto currencies.