What are the advantages and disadvantags of supersonic ans hipersoic travel.

The most important advantage of hypersonic travel is speed. You can get from New York to Tokyo in just a few hours instead of 15 hours!!!Bad things is that these.jets are really noisy and some people  might not appreciate that. It also might not be safe, and it might be very risky to go on a flight that fast. But their are good things too, for example a business man needs to get somewhere really fast or he will be fired from his job, in a supersonic jet he might not get there on time but on a hypersonic jet I think its possible.As I said before this might not be safe, traveling very fast can be good in some ways and bad in others.