What are the parameters that affect bitcoin?
Because such currency is centralized, which means everything factors about the country/government also van affect the currency market.
Bitcoin is different because it's decentralized, and otherwise bitcoin comes when the country have bad economic system, such Venezuela recently.
Also like other currency bitcoin influences by demand and supply, but because the supply is limited, it's could be manipulate by whales/dinosaurs (people who have a lot coins / people who already mined bitcoin & have a lot coins).
As you said yes, bitcoin is not influenced by the current political structure of the world because it is not a central system. Bitcoin is only valued according to people's demands and is affected positively or negatively by the news about bitcoin. There are also very few people who use bitcoin when we look around the globe. Bitcoin is somewhat independent of the world economy.
The bad effect those who are experience of scam are treaten bitcoin as scam and heard that bitcoin uses for illegal activities because of anonymity..
The use of bitcoin in illegal activities is not a problem of bitcoin. Malicious people can use it for illegal activities in other payment systems after they request it.
When compared to other payment systems, Bitcoin offers a much more transparent system.