Should I move over to the second lane for speeding cars on national roads at night?

A few days ago
on a two-lane one-way national road with an 80km speed limit
on a road without a single streetlight
I was driving in the first lane at about 90km/h.
Suddenly, my rearview mirror flashed.
A vehicle approaching rapidly from very far away
was flashing its high beams to tell me to move over.
I am a driver who has the habit of using the first lane only for overtaking on highways and keeping it clear,
but the first lane on a national road isn't an overtaking lane, is it?
Of course, since overtaking is supposed to be done on the left,
I usually move over to the second lane if a faster car pulls up behind me,
but this felt really unpleasant.
Seeing them overtake me, who was going 90, in an instant,
the other car's speed felt like it was around 130.
I encountered another car like that that same day,
and it even made me feel scared.
On a road with no streetlights
and a national road with intersections and crossings here and there,
driving like crazy
while flashing high beams to demand the first lane be cleared.
Am I supposed to move over?