In my country, payments using Bitcoin are prohibited (because it is regulated by the state, only Rupiah is permitted), but for P2P, it is usually not a problem as long as the buyer and seller have agreed with each other and promised not to harm one party (reporting it to the authorities).
I also plan that if I want to buy a car or a house, I will ask the seller whether they accept payment with Bitcoin because making transactions with Bitcoin is easy, simple and transparent.
What?
There's no difference between P2P and using Bitcoin as payment tool via third party, if you use Bitcoin, it means they both are forbidden CMIIW.
I consider it as a private transfer and it's dangerous. If you buy a car or a house which is costly, when the tax office ask the proof of the transaction, you won't able to give it. Bitcoin blockchain is transparent, but people who not understand will know nothing.