Castle will be doing a hard fork in some days, releasing Masternodes.

Castle is releasing an Automatic Airdrop Platform for tokens/coins to promote their projects mainly via Airdrops.
Castle CSTL coin holders receive airdrops from those projects. The more CSTL, the bigger is the airdrop quantity.

Worth keeping a look into, some people are already filling their bags up.
Exchanges:
https://stocks.exchange/trade/CSTL/BTC

Website: https://www.projectcastle.tech/
ANN: https://bitcointalk.org/index.php?topic=2454798
Infographic: https://www.projectcastle.tech/img/Castle_Infographic.jpg
White Paper: https://www.projectcastle.tech/White_Paper.pdf
Discord: https://discord.gg/GgHJs8s
Twitter: https://twitter.com/CASTLE_CSTL
Telegram: https://t.me/castle_cstl