1. Blockchain based new games for gambling platform
2. Decentralized trading platforms
3. Probability of confirmation checker for bitcoin transactions so that bitcoin transactions can be accepted instantly.
4. Decentralized storage
Are few ideas which still need to be developed and this have demand in the market.
1. Hard to start, lot of legal issues
2. Yep we need tgat
3. Uhhhh, sure. So LN?
4. That's... That's what bitcoins are. Did you not get the memo?