Also we can get free crypto by participating in bounty campaigns. That is different kind of campaigns like: Social media activity, translation, article writing, creative campaigns or sognature campaign. Also we can get passive earning when hold some coins.
That has been a waste of time during the last year and this year has not been that much better, there was a time in which participating in those campaigns was extremely profitable but since then many things have happened that has limited the effectiveness of participating in those campaigns, icos began to ask for KYC information, then the market crashed, no one wanted to invest in icos which made a lot of projects fail before they even began and scammers did not paid bounty hunters after they completed their job.