2. Money - Could they ultimately lose more income, if they stop mining Bitcoin and then get less gain by doing a double spend? <51% attack>
3. Nothing to gain? - Destroy one Alt coin and 2 will spring up in it's place?
Economics is everything when it comes to huge mining corporations, there is nothing to gain when they are destroying the alt coins but if they decide to do that the amount of power and energy they are spending just to destroy something without any return is a fool's errand and no one in their right sense will do anything of that capacity until they have an agenda to destroy a particular alt coin.
4. Everyone lose - When the media find out that a 51% attack were succesfully executed on a Alt coin, it might give all Crypto currencies a bad reputation. < Possible investors will turn against Crypto currencies, because of the security risk? >
If someone really decides to attack a certain alt coin, do you really think that they will think about the implications what the media will bring to the coin, it is not a new thing that coins die off and even ETH had a rollback without any consensus, if an alt coin dies no one cares unless it is a top level coin in the market list.
I am curios to know why large mining operations are currently playing fair, when they have the hashing power to destroy most smaller Alt coins. Let's discuss the possible reason why they are not doing this.
As mentioned above, it is all about financial gains as they have invested heavily into mining and time is of the essence as the mining reward goes down with time and the competition is really high in the mining sector and there is no point in spending their electricity to destroy something is the simple reason large mining operators are not doing anything stupid.
