I can recommend to check out https://www.crowdholding.com
There are bounty campaigns in the tasks on this platform, which are highly automated and you don't have to waste your time and fill in various forms to confirm your participation. There are also many questions and tasks from businesses, and you can earn crypto even for sharing your thoughts 

You can find bounty campaigns on https://www.crowdholding.com
There are also many different tasks out there to answer and get crypto as well 

Awesome bounty campaign! You can also check other bounties on https://www.crowdholding.com . On this platform bounties are automated and you don't need to go through large texts and processes. Cheers 

Awesome bounty campaign! You can also check other bounties on https://www.crowdholding.com .  On this platform bounties are automated and you don't need to go through large texts and processes. Cheers

Other bounty campaigns you can find on https://www.crowdholding.com . There you can keep up with new projects and earn crypto for participating in promoting the businesses. 

Really interesting bounty campaign. You can also check other bounties on https://www.crowdholding.com . Bounties are automated there and you don't need to go through large texts and processes. Cheers

Really interesting bounty campaign. You can also check other bounties on https://www.crowdholding.com . Bounties are automated there and you don't need to go through large texts and processes. Cheers

I'm curious if there are some crypto businesses devoted to social responsibility or at least somehow doing CSR...

I think that investing money and relying on the returns is not a good start for earning crypto. You need first to invest your time, to gain some knowledge about cryptocurrencies, trading, blockchain. While educating yourself, you can also try earning some altcoins without investing. For instance, check out this article on how to earn crypto without investing: https://medium.com/crowdholding-innovation-platform/how-to-earn-cryptocurrency-without-investing-or-mining-9a996f27739f

I use https://www.crowdholding.com to earn crypto for giving my feedback and opinion to different startups. It's a co-creation platform where businesses look for crowd's insights. Different bounty campaigns are also there. Other platforms you can check for bounties: Bounty0x, Bugcrowd, BountyFactory, etc.

Be careful while investing in ICOs. First, invest your time, not money, to understand what the business is doing and what are the perspectives. So, invest in something you understand.
There is also an option of gaining some altcoins without investing. For instance, you can find here several ways of doing so: https://medium.com/crowdholding-innovation-platform/how-to-earn-cryptocurrency-without-investing-or-mining-9a996f27739f

 - There is no third party in this market. It means no paperwork and lower costs. Everything is peer-to-peer
 - Strong security: none of the cryptocurrencies can be reversed, backtracked or even counterfeited by anyone
 - Accessibility: everyone can get an access to crypto

Bitcoin is not only about cryptocurrency, but also about blockchain. This technology is used a lot and will be used in spheres we can't even imagine now. Besides, there are many other cryptocurrencies, so we don't need to focus only on bitcoin.