Over recent months and years, i've managed to obtain a basic knowledge of Bitcoin and will move onto Lightning in the near future. Through reading up- and learning about Bitcoin's inner workings, I've been surprised time-and-time again about the ingenious design of Bitcoin, and with the rise of Lightning, I've been surprised once more about the smart solutions and implementations some individuals manage to come up with, which begs the question; what's next? Are there any BIP's that one should keep a close-eye on? Any ideas that are being worked on and that one should know of?

And while we're at it; any marketplaces or tools / website which are in the making, and which one should know of and/or make use of?