In terms of reducing governmental control, sure this isn't much of a problem if your government is altruistic. Governments do not have a great long-term track record here. In Venezuela for example, many would say Bitcoin is solving a very real problem. You're right about its ability to be used for illegal activities, however the same could be said for most technology: encryption, the internet.
In terms of energy, this can be a criticism of almost all currencies and stores of value. This real-world expenditure is much of what gives it value, especially early on. Gold is valuable because of the difficulty in mining/acquiring it. Even national currencies are valuable due to the resources committed by their military, or the military's of that nation's allies. People might argue it is GDP, but GDP does not mean much if you cannot defend it.
Manipulation and price swings are a valid concern, but no other currency is immune to those either. Silver for example has had very widespread manipulation in the past. Silver and gold have probably still been a net-positive.