user62869: I am confused between the forking that can be created because of the 51% attack and the soft fork and hard fork.
Does forks because of 51% attack can also lead to new crypto currency creation?

user13866: Any forking that results from a 51% attack is a fork of the blockchain. It is a fork in the data, not in the rules.
The phrases "hard fork" and "soft fork" usually refer to a fork in the Bitcoin rules. So that is a fork due to software changes that implement either a change in the so-called consensus rules or a change in the network protocol.
So they are different in that way.
So far as I know, there has never been a successful 51% attack in Bitcoin, so I don't think we can say for certain what a long term outcome might look like. I guess that all blockchain forks are eventually resolved one way or another.

See What is a soft fork? What is a hard fork? What are their differences?

62869: <p>I am confused between the forking that can be created because of the 51% attack and the soft fork and hard fork.</p>
<p>Does forks because of 51% attack can also lead to new crypto currency creation?</p>
 13866: <p>Any forking that results from a 51% attack is a fork of the blockchain. It is a fork in the data, not in the rules.</p>
<p>The phrases &quot;hard fork&quot; and &quot;soft fork&quot; usually refer to a fork in the Bitcoin rules. So that is a fork due to software changes that implement either a change in the so-called consensus rules or a change in the network protocol.</p>
<p>So they are different in that way.</p>
<p>So far as I know, there has never been a successful 51% attack in Bitcoin, so I don't think we can say for certain what a long term outcome might look like. I guess that all blockchain forks are eventually resolved one way or another.</p>
<hr />
<p>See <a href="https://bitcoin.stackexchange.com/q/30817/13866">What is a soft fork? What is a hard fork? What are their differences?</a></p>
