Also there are security concerns. when you buy things online, you run a small risk of getting your
financial information exploited by hackers.
I must say, is there a good anti virus and anti malware can offer Fair Ninja for a great deal protection?
There are really some security concerns that's why they used blockchain technology and smart contract for this matter though it is not 100 percent guaranty protection but this is what i found in their website (Q&A):
5. Is Yoshi coin an anonymous cryptocurrency since you claim anonymity?
No. We provide anonymity in the sense that all that is written in the contract is the username to keep the transaction/user safe and the sum that is being transfered. Keep in mind we don't want illegal activity on our platform as all the ads will be moderated so it wouldn't contain items or services that are illegal.
Think of it as buying with "cash" only you have a platform that is keeping your transactions safe and you don't have to pay high platform/bank/wire or exchange fees.