Hello, PlusCoin is based on the Ethereum blockchain. - SAD.
What about your own project? Own blockade is much safer than the product of the Vitalik. Forking is simple

To provide stable system performance and carrying out on the Etherium blockchain our own inner transaction performance service was developed. But, in general, we use the Etherium blockchain, which was chosen because it's simple open-source API (interface). Moreover, this platform is one of the most developed and popular in the blockchain technologies field.