1. Apologies for the misunderstanding. I didn't mean to say the code will be open to exploits, I meant the code will intentionally contain a backdoor at an agencies behest. Exploits are another matter entirly and open source has its pros and cons for that purpose.

2. Then TOR bridges could be blocked at ISP level or made illegal. We're starting to see censorship arise on the internet and it's possible.

3. Many of these use cases are of course valid, But I will add their exist transaction fees which are paid when bitcoin are transferred, plus exchange fees when bitcoin is exchanged for real currency. It's not a fee free currency as suggested. I would add (and this is of course a guess) that most users will have illegal purposes and intent in mind. If only because they have most to gain from Bitcoin use. Most average folk don't ever see a 2% Visa fee as business absorbs this cost, so for a user purchase fees for everyday goods is not a value driver. I can see it being used for tax avoidance, money laundering and payment for nefarious purposes. Other use cases do not stand up to value analysis.