Bitcoin holders have an opportunity to claim Stellar Lumens (XLM) at the rate of approximately 1,000 XLM for every BTC held on JUne 26th 2017 ... but you need to take action NOW and only have a 2 month window.
Stellar are distributing up to 16 BILLION Lumens to bitcoin holders or 16% of the initial Lumen - to any bitcoin holder who wants them, but you need to take action to CLAIM these Lumens if you have bitcoin in a wallet on your desktop or phone.
If you do NOT claim them by August 27th, then the Lumens will be considered unclaimed and will go to Stellar.org’s operational fund and to the Build Challenge.
Currently Lumens are worth around 3 cents each so at the rate of 1,000 XLM per bitcoin that's a potential $30 gift per bitcoin.
Check out the Stellar Lumens Claim Page for full details - and claim yours now :
https://www.stellar.org/blog/bitcoin-claim-lumens-2/