Buy or develop your own time machine and go back to 2008 and mine BTC on the computer at your mothers house in the basement
You don't need to go back from the time that bitcoin is low, you just need to work for it if you want to be rich, there is no easy to be rich imho and not only bitcoin give you oportunity to become rich.
A person must not be an empty dream. A person should have specific plans for the future. Then, there is a high probability that the person in the future will get exactly what he wants. The same can be said obitkoin. You do not need much to be an impossible dream. We need to work and be able to think properly.
As long we are realistic with our dreams we can rich it in the future, if we dream that the price of bitcoin will increase because we have invested their a good amount of money then your dream is too realistic because we know that once a massive adoption is achieve the price will increase accordingly.