I don't know where you may have got all these merits and demerits of cryptocurrency from, but I must say that you are totally wrong on most of the points you listed above @ O.P, because cryptocurrencies do not in any way give you risk management attitude, nor does it give you knowledge of trading as those are special skills that can be learned and have nothing to do with crypto or Bitcoin.
And secondly, crypto has never been time-consuming, nor discouraged people from seeking a further career in whichever industry they wish to, or a factor that cause death. But it's just an investment asset whose price value fluctuates