In order to get citizenship in another country? I'm just curious how this goes and the pros and cons. Obviously I have some research to do.
From which country to which other country?
From the US to a Euro country. I guess they all have different requirements, right?
Yes they all have different requirements, fox example Germany from what i know it's not possible to have dual citizenship, most EU countries do not allow dual citizenship or have a long list of pre-requirements before allowing dual citizenship. Italy and France are bigger eu countries that allow dual citizenship. I'm from Macedonia, small country in eu. My grandfather imigrated to USA 45 years a go and his wife, born and raised in USA just got Macedonian citizenship, but i guess you don't want macedonian citizenship hahaha. It's a poor country but pretty low taxes 
I know quite a bunch of germans who have dual cituzenship, so that's not really true... But yes, there are some prerequirements. Most of them are country specific I believe, so it'll require some research.
The only guys I know that have renounced US citizenship are people who haven't grown up in the US and felt the negatives of keeping citizenship largely outweigh the positives.
i was wrong, you can have a dual citizenship if german passport is your second but not the other way. German citizenship is automatically lost when a German citizen voluntarily acquires the citizenship of another country