This site www.crypto51.app shows the cost of a 51% attack on pow coins and you can see that the lower marketcap coins are really cheap to attack thus I think that pos should be the way to go longterm to save yourself from such an attack.
This site www.crypto51.app shows the cost of a 51% attack on pow coins and you can see that the lower marketcap coins are really cheap to attack thus I think that pos should be the way to go longterm to save yourself from such an attack.