If source code of the coin is published online anyone can take over, fork it do whatever they want. Most coins publish their code on github so look there
Therefore in this case, i read that some devs even swap the old coins to new coins once take over. How does it work?
Lets say when Dev A run a project with Fix coin 50,000,000 with POS feature.
10,000,000 was sold during ICO which left out 40,000,000 in the Chain.
When Dev B tookover it, is there chance that Dev B Reset the coin back to 50,000,000 but doesn't fork it?
Thanks for explanation!