Well, this question is purely subjective. Choosing between trading and investing really depends on your preference and your convenience because although they have the same concept, they are different in terms of how you use it. You can go for trading if you want to earn for a short period of time. In trading you can buy and sell within a day as long as you reach your desired profit. Investments pertains to a longer period of time, longer meaning after months and years. This one is way to convenient than trading because you don't have to check on your assets from time to time. Both of the two are the best way of earning bitcoin.