If cryptocurrency isn't the preferred payment method of criminals,how can you explain that it's the main method used in the Darkweb?
Darkweb represents only a tiny fraction of the contraband trade. Do you really think that the total turnover of dark webs come anyway near that of the Mexican cartels? According to the latest estimates, the combined turnover for all the dark web sites was less than $1 billion in 2018. The annual turnover of second-string Mexican cartels easily amount to a few tens of billions of USD.
Not only the robber is blamed,the bank is also blamed for lack of security measures to prevent the rob, similar senario concerning exchanges.
May be. But no one blames the fiat currency for the robbery.
Bitcoin isn't protected from volatility either which is far worse than inflation.
That depends on the individual preferences. For me, I would prefer a currency that is protected from inflation, versus a currency that is stable.