You want have and use a time-machine?

Oh yeah! For to be the most powerful man (or woman) of the world and history!

No, for the danger (Time Machine Dangerous Theory = A little change on the passed can change all the humanity for the future)

Just for used one time (Accepting any consequence for the Time Machine Dangerous Theory)

Just for sell it to the government of my nation or other and win money

Yes for help the humanity with scientific and academic help (support) using the time machine