I think it's good to have a proper attitude: cryptocurrency is just another form of money. So, your question
is quite easy transformable to "how to earn money". I saw a very good reply in this topic from another
member: "Sell your skills". I suppose it's the best way to earn money (doesn't matter, real money or crypto).

Common approach: the more rare and of a high demand your skill is, the easier is the way to sell it and earn money.