You can earn cash without investing by joining bounty campaigns, its a way you can help in promoting projects, enlarging its community, sharing their goals and many other tasks this way you can be awarded for your serious and hard work but one thing to put in mind that, when choosing bounties, first do a good research to be able to make a good choice because 80% of ICO are scam, also, try to read carefully the rules before joining and understand them well thus you can do a good and worthy job.