There are plenty of ways you could follow in order to earn that amount of money. For example:
1. If you already have some money, say $1000. Invest them in an ICO with potential, and if you are lucky, you might get 1500% increase in just 2 days
2. Participate in Bounty Campaigns, you can earn serious money there
3. Airdrops, Giveaways, you can never know how lucky you might get