Yes bitcoin also has advantages and disadvantages but that doesn't mean it is not perfect. It transactions are irreversible because it is a decentralized cryptocurrency blockchain nobody control but if the recipient is a good person and you discuss with him or her, you the coins can be send back to you therefore it has been reversed .

The volatile and unstable Market price make bitcoin more interesting because when the price is low anybody who has money at that time can buy it and hodle it for the next bull market.

Remove that particular clause that says "bitcoin is used for crime". Bitcoin is a newbie in the world and crime has been on this Earth centuries before even bitcoin come to this world so bitcoin has nothing to do with crime. It is crime that comes to it and not bitcoin that looks for crime. People use it to commit crime and that doesn't mean bitcoin is a crime invention.

I only like democracy and not capitalism. I am not a pro capitalist but a strong believer of socialism. And I might only adopt the mix economic system. Yes I agree with you on the saying that, the flaws of bitcoin is not it weak point either they are making it more stronger.