1). You can earn a lot with the aid of 'Bounty Programs.' In a simplistic context, bounty means giving rewards for completing some tasks. Cryptocurrency projects can furnish you bounty in digital assets for completing some tasks for them, such as posting on Facebook, Twitter or other social media platforms.
1). 'Airdrops programs' are part of the ICO campaign of a blockchain project. You can earn cryptocurrency by promoting and broadcasting the opinion of projects on social media sites and platforms.
2). 'Coinbase' can also help you earn free Bitcoins [BTC] by implementing two opportunities to its users; one can earn while acquiring knowledge regarding cryptocurrency, and by watching their tutorial lessons.
3). You can build your career as a 'freelancer' for blockchain technology and get paid in bulky amounts. There a lot of websites offering their platform for freelancers.
4). Finally, here is a way I earned many free Bitcoins, and currently, still, do today. Do you love games? If so, online game lovers can make money from Bitcoins [BTC] by 'playing games online.' There are hundreds of games available on the internet, which rewards you in Bitcoins [BTC].
So there you have it. Now go out and make things happen. There is absolutely no risk because it is all Free. Time is your only loss if things do not go towards your advantage while trying to build your portfolio of Bitcoins [BTC] for Free. Good luck.