Bitcoin has problems, but a lack of accountability isn't one of them. You could argue cash has "zero accountability". What stops you from stealing cash? The law. Because the law doesn't care about bitcoin, yet, doesn't mean it never will.
Bitcoins major problems are two:
1) Fixed supply ideology. Anything with a fixed supply, when up against the nature of human economics, is deflationary. Bitcoin proponents will aruge that coins are divisible so wages and prices will scale accordingly, but this is an incorrect assumption. If that were true no amount of inflation or deflation would ever be a problem as the market would just auto-adjust. The truth is, targeting a small amount of inflation in a currency is ideal for a lot of good reasons I won't ramble on about. You will never get them to listen on this point anyways.
2) The 51% problem. The only labor involved in "mining" bitcoins is the creating the integrated circuits that can solve the SHA hash. Because only specialized industries can provide this labor a 51% monopolization of the network is almost a certainty. We can already see ASIC manufacturers getting
dangerously close to this today. Bitcoin proponents will argue that ASICs ruined everything. If we could have only kept mining exclusive to general purpose CPU's everything would be fine. What they don't understand, is the problem of specialized labor, being the only labor required to mine a bitcoin. Because of this, whether it's intel, or ghash.io, or AMD, it doesn't matter. Someone is always going to be able to use their specialized labor to monopolize the market. It will never be safe.
Bitcoin is a great idea. We need something like bitcoin going forward. However, we'll see better success in something like bitcoin2.0 as the current implimentation is just broken from a technical and economic standpoint.