The two ways that you mention are part of the strategy that I use.
Long-term investments, in my opinion, are great to do.
Given that experience like the year 2017, it is able to generate many advantages.
But since 2018 many long-term investments experienced the dilemma as many coin selling prices declined.
Short-term trading is a great option for making a profit every day.
All very good to do only time and patience that makes you can make a profit.