There are quite a lot of similar platforms when you can trade from hand to hand. For ordinary money. Why should people bother buying cryptocurrencies, when all this can be done for ordinary money.
We are moving towards an unprecedented economic change in the history of mankind. Thanks to Blockhain technology and cryptocurrencies,
the transfer of monetary value becomes almost instantaneous, borderless and at almost no costs. I will not mention the observation of the moneyflows.
There will be more and more people that will prefer to sell theyr old items for crypto.