I think using something as an intermediary (money) is fine but that is not the problem, the problem is that there are no laws limiting the hoarding of the supply of money such as what can be done with the US Dollar and also the inflating of it's supply. Bitcoin does a have a capped supply so that's good, but satoshi should have implemented a way to prevent hoarding to stop the potential of centralization of the bitcoin supply which does matter it's not just the network centralization we need to be worried about.
Discussion
What are you talking about?
1) You can buy p2p
2) You can't lock all the scammers. They keep coming
1. Unfortunately p2p does not prevent market monopolies. It does allow you to bypass middlemen such as banks though and retain financial privacy
2. No, big companies are not scamming you out of your money, they might be price gouging but they're not scamming you.