Is that even possible ? Of course it is, upvote this post and see for yourself ;)
That was me trying to be funny, but in actuality thats one of the best ways to earn crypto's without spending money.
Going down from the best ways to the not so good ones.
The Steemit platform I am writing this blog post on, allows users to earn crypto when they curating (upvoting post like you should be doing right now :S) You can also earn if others upvote your posts and even comments... thats right you can earn from commenting.
Bounties, those are task usually social media related. When new blockchain companies want to get the word out they can offer to give their coins for liking their page or sharing, or something of that nature, those can be mostly found on ICO's initial coin offerings basically an ICO is a way for new blockchain companies to raise funds while giving their supporters their coins or tokens.
Here are some ways to find ICO's
https://bitcointalk.org/index.php?board=159.0
http://icorating.com/
I also used this in the past
https://theviralexchange.com/?ref=JQaJnIqUFagJ
on there I got 20 HMQ from the humaniq ICO for liking their Facebook page now worth $4.10 an ICO can x10 x100 or even more in value, not bad for a Facebook like. here is an ongoing ICO bounty https://exscudo.com/bounty/Mining, now this can only work if you are not paying for electricity because having a computer running all day can really rack up the bill. How much can you earn with mining ? It all depends on your computer/computers you can also use your android phone to mine but don't hope for any miracles. Minergate is very easy to use https://minergate.com/a/0e492d8cc8ecb458714bdadc
try it out and see what your hashing rate is you can then take that number into their website calculator and see how much you can earn. My computer gets 12MH/S so It earns around $15 usd a week (bare in mind thats not counting electricity prices or the price swings of the crypto you are mining)faucets, basically websites that give out small amounts of crypto, most will have referrals so if you can get others to use the faucet thats going to help you earn a bit more.
Here are some faucets that I have tried, starting with the best
https://poswallet.com/ they have many built in faucets and you can also stake your faucet claims (that means earn interest )
http://moonbit.co.in/?ref=5dba8a105c5e
http://moondoge.co.in/?ref=21d377b30a6d
http://moonliteco.in/?ref=25add8528785
moonbit, lite and dodge are one of the best faucets I have found you can claim when you want and there are lots of bonuses for coming back daily among other things.
I would suggest opening an account on poloniex.com or another exchange and using those deposit addresses for your faucet claims,
and the reason is that you are not earning that much and when sending coins there are transaction fees that are going to cut into your small faucet earning.
And thats the end of my guide on how to earn crypto without spending money if you have any other methods please share in the comments bellow, I did not put accepting crypto for wages or selling stuff for crypto but those are options as well.
Hope that helps If you have any questions or comments hit me up bellow and make sure to follow for more.