P2P loans is not necessarily cryptocurrency
I have a problem with confusing person-to-person loans with funny money.
If the loan is made in the national currency, what does the government have to say about it (other than the fact that China is a dictatorship and wants to control everything) ?
If I meet a friend and loan him in person €1000, the government has nothing to say about it. If my friend never gives the money back, that's my problem to deal with. P2P loans are the same thing.
Just mandate that P2P loans cannot be made in funny money.
Life will find a way.