Just like heroin or crack cocaine, it creates an addiction.
Same as was gambling
Many in here seem to have been caught up in it, spending far too much of their money on something. Partially to get the dopamine rush of buying more coin, and partially to satisfy their gambling lust hoping to score big.
It is no different than the people gambling their savings away on the roulette. Right now we are at the point where they have entered the casino and have been lucky, so they are up more money than they came. But instead of quitting while they are ahead they genuinely believe that their luck continues.
In the end it ends bad.
I'd venture to say that it is not Bitcoin which is addictive like drugs, it is fast and easy profits that people quickly get used to and can no longer live without. Though I agree that this addiction can end badly because it can be said that this money is unearned. Easy come, easy go.