If I buy something online, the shop can also take my money and not deliver. Successful shops deliver because it's more profitable long term. So the same problem exists today.

You could have ways to rate people and products, like you have trustpilot now.


On another note. The computer would asks users if they are interested in voluntarily contacting people that have done a transaction and see if things went correctly.

You tell the blockchain what you want and what you have to offer. Volunteers will tell blockchain where the resources are.

So say in Africa a man submits he would like to fish all day. Another man wants to ride his bike. Another family wants to eat fish for dinner. The computer links up all three, so that the extra fish the first man caught, will be driven by bike to the family.

You could have different matching algorithms that are competing just like crypto currencies today.

After time the computer would play a bigger and bigger role, until decentralized anarcho communism could be achieved. Maybe after fighting off the governments first.