You may want to ready my post again. Initially, no one will just take your property.
When the Constitution is amended to allow for EWC under certain circumstances, the government has effectively cancelled and done away with your and anyone else's property rights. Because, at any point in time, the government can make an announcement that your property will now be EWC due to X, Y and Z and they will take it without paying you a single cent and forcefully removing you.
This is the reason why private rights groups are fighting the amendment of the Constitution. They do not want to leave these loopholes open and see an end to property rights. There should be some form of compensation if they want to take your property for any reason. This will allow you to use the money to start afresh elsewhere. Also, this is the same reason why amending the Constitution to allow for EWC will fly in the face of various property rights agreements globally, one among which, AGOA, others the UN and more.
If this is forced through, there will be no uprisings, because what happened in Zim will transpire here too. If you refuse, you will be dealt with by the police, army and here the masses too. You and your family will simply pay with your lives for your refusal.
With amending the constitution, to allow for EWC, property values will just continue to fall in SA, as it is doing at this point in time. Very, very few investors will ever be willing to invest millions in properties that could be taken at any point in time. After some time, the property market will collapse and it will just be a small economical player.