I think the P2P should offer competitive interest rates compare with banks to be more attractive.
I'm not sure P2P is a magical bullet. Banks have been in business a long time, and while they obviously can make mistakes they usual have rather strong protection against fraud and have large departments of staff that are dedicated to risk management. What you'll tend to find is people that have a hard time borrowing money from a bank (maybe because they have not paid it back in the past) will try to borrow via P2P lending services. Ultimately these high risk borrowers will default on the debt to private lenders. China is having a bit of a P2P lending crisis at the moment
Exactly this. P2P lending and crypto lending is mostly subprime, which is why the interest rates are much higher and the defaults are much higher too.