In my opinion both are profitable, you can make Bitcoin a source of income while investing. You can combine the two into one goal, when you have the opportunity to make Bitcoin a source of income, it means you also have the opportunity to make Bitcoin an investment plan.
You can fill in the activities between the main activities outside the forum to make Bitcoin a source of income, such as receiving payments in the form of goods and services using Bitcoin. Then the Bitcoin that you already hold can be used as the most profitable investment asset.