Ok neither of these are easy but as a long term strategy to do think its best to day trade and try and get 1-2% a day or invest in a couple of coins and try and get 20% over a month
some things you need to keep in mind:
1- Choose good currency, in my opinion bitcoin is the best option
2 - have a good capital, and in my opinion is more profitable when you have more than 1 btc
3 - Do not set goals as if every day you would be forced to have profits from 1% to 2%, there will be days that you will not be able to trade for several reasons. The best would be you just make trade without estimating goals for your mind do not charge much of yourself (do not feel much pressure)
Some quick maths for you (starting with 1000$, 1% per day + reinvesting profits = exponential):
In 1 year youll get 1.01³⁶⁵ = 37x (3700%) = 37K. Well done, getting some nice profit for your hard work.
In 2 years youll get 1.01²*³⁶⁵ = 1427x = 1.4M. That Lambo is finally yours. I hope you went with yellow.
In 3 years youll get 1.01³*³⁶⁵= 53939x = 53M. You own boats and planes now. Ballin 24/7.
In 5 years youll get 1.01⁵*³⁶⁵= 77002912x = 77B. You own a country now.
In 10 years
The Universe is yours, congratulations.

if he does exactly so he will be the next richest man in the world