Being first has advantages.
For example if you have patented technology or a strong network effect where the value of the service or product increases when the number of users increase, think social platforms.
However, being first is not by default the best option.
There can often be significant disadvantages.
If you’re first, the market is uncertain, unknown, or underdeveloped.
If you have an original idea, don’t rush to the market simply to be “first”.
“Moving first is a tactic, not a goal.”– Peter Thiel, Zero to One