For example, let's look at a musician who comes up with a great new melody. The song isn't finished yet, a publication isn't possible yet. Already in this early phase he can play the melody as an MP3 file or a sheet of music on his computer and simply drop it into the wallet. The file hash is stored in a blockchain transaction and is now tamper-resistant and permanently stored. He now has proof that he already had the idea for this song at that time, without having to publish it.
many coins existed can deal this,bitcoin,ethereum,and so on.
Before you release a coin just for money raise,think a bit more,the market is becoming more mature.