Recently I launched a platform that lets tech startups run crowdfunding campaigns for bitcoin. It works with escrow and it is very safe for investors to deal with those startups:
- nobody touches investors' money: collected via escrow it goes directly to developers;
- stage by stage investing: a startup slowly but steadily receives funding and gains value;
- investors become co-founders of each startup;
- minimum amount 0.05 btc;
- trade shares you own online as their value changes.
Here is the link to the website
https://www.tiptopfund.com/The link to my thread here
https://bitcointalk.org/index.php?topic=1840814.0 
