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Yeah except if the time machine allowed actions of the past to change the present. If you change the past it affects the future. That is a quandary of time travel.

For example what if you go back into the past and are driving, get into an accident and kill the other drive. Turns out the other driver is your dad. That change means you arent born.

The grandfather paradox hehehe... Sometimes I like to see these subjects. Yes, I would purposely alter the past.

One more millionaire with BTC wouldn't affect much in the present for other people.... 😅