Localbitcoins.com is most widely users crypto fiat method
Not really, people like to use local exchanges more than P2P networks like LocalBitcoins. In case of Local Exchanges there is little room for arising disputes in trades as funds of both parties are confirmed before exchange is carried out. But in case of P2P, there is no perquisite to deposit funds on Exchange, hence it leads to unnecessary delays and disputes. LocalBitcoins is more popular in countries where Local Exchanges are banned.