Many people are thinking of other ways to make money. There are many people who have become rich because of Bitcoin, but there are also many people who have lost their money because of Bitcoin.
The world will not change much. Other innovative technologies would have been discovered without Bitcoin.
Bitcoin does bring a lot of convenience to people.
There are people who think of the positives of bitcoin than they think of its side effect. Those who are hit badly and into losses by bitcoin will tell you that bitcoin is the worse investment they got into and will say to hell with bitcoin. I also think what you said that it is true bitcoin brought convenience to people but without it the world will not change much. Bitcoin is not the absolute.