My long term project and maybe few people knows it :
1. Citizen finance : NFT for games, first person shooter gaming
2. Vulcan forged ( PYR ) : game like skyrim. Not launch but i believe they can launch it ASAP.
3. Sovryn : DeFi on RSK network which use bitcoin mining power ( it will be the most safest DeFi on earth )
4. Ethereum : No body doubt about this..
5. Ccfound : i thought the next big think for blockchain use case is social media on blockchain like this project. ( not advice, just my opinion )