Usage patterns
〈物〉の先端が尖るthe tip of something is sharp/pointed
The tip of this pencil is very sharp.
〈事〉の先端を行くto be at the cutting edge of something
That company is developing products at the cutting edge of the times.
〈事〉の先端に立つto stand at the forefront of something
He is a researcher standing at the forefront of medical technology.