This could be the antichrist but I rather think it is the ^west^ - Great Britain followed by the United States.
The crown represents authority.
If this rider is the ^west^ the crown represents the glory of God upon those nations which accepted Christ Jesus and made Him the core of their civilization.
If the rider is the antichrist, he will be given power (a crown) from the globalist world leaders.
In either case there is conquering but there is apparently no war.