It is important to clarify a common misconception here. Electrons, as elementary particles, do not spin in the way that macroscopic objects do. The term "spin" is used in quantum mechanics to describe an intrinsic property of particles, but it does not refer to a physical rotation like a spinning top.
The concept of the speed of an electron is related to its kinetic energy and momentum, which are governed by the principles of special relativity. According to Einstein's theory, as an object with mass accelerates closer to the speed of light, its energy and momentum increase, and its mass appears to increase as well. This effect is known as relativistic mass increase.
However, it is important to note that the mass increase does not imply that the electron is physically moving faster than the speed of light. As the electron's velocity approaches the speed of light, its relativistic mass increases, requiring more and more energy to further accelerate it. To actually reach or exceed the speed of light would require an infinite amount of energy, which is not feasible.
In practice, electrons in particle accelerators can be accelerated to speeds very close to the speed of light, but they never actually reach or exceed it. Instead, they approach it asymptotically, getting closer and closer to the speed of light but never surpassing it.
In summary, an electron cannot move faster than the speed of light because, according to our current understanding of physics, it would require an infinite amount of energy to achieve such speeds.