A decentralized cryptocurrency exchange. I have heard so many times about it that i am bored. No new ideas, no new possibilities, just one from 1 million.
Now there are a lot of projects focused on creating marketplaces with embedded blockchain in their ecosystem. There are a lot of such projects and all that they can offer - integration with larger stores, fraud protected transactions and obtaining special privileges for the calculation of the project's tokens. A calculation for the tokens, which, when examined in more detail, are completely unnecessary and only harm this system. But even so, many such projects bring profit to their investors. The main thing is to correctly dispose of your coins and sell them in time.
Even if there are millions of such projects, they will still make a profit for those who can correctly use their investments.