New platforms are continually emerging
A new ecosystem is continually appearing.
New projects are launched from those platforms and tokens are issued.
From the Ethereum platform, countless tokens are issued, and each advances its own development.
For example, it could be ETH, MATIC, or ONE.
If you think of those tokens as fees paid when using a service, it becomes easy to understand.
And since they are developed on the same platform, they are compatible, and the "software" (DApps) each has developed can be used as SDKs (open source available to anyone).
What Ethereum first created is an SDK that makes it easy to issue tokens with blockchain technology through simple settings.
By using it, the project is agreeing to issue tokens on the Ethereum platform.
A cryptocurrency that only has the blockchain technology that constitutes Bitcoin, like Bitcoin, has no platform, so token issuance is impossible.
Tokens cannot be issued freely unless you have a platform-enabled cryptocurrency.
This creates the difference between “high flexibility” and “low flexibility.”
It is advantageous for many projects to be developed within the same platform.
And the reason for focusing on those new platforms is to find third- and fourth-generation cryptocurrencies.