How so? BTC is open source and developed in collaboration with many developers worldwide. Anyone is free to check the code and submit their contributions on GitHub. Whatever changes/improvements are proposed, will only become official if the network approves it. This consists of miners and node operators alike (consensus). Think about democratic countries such as the US and EU. People vote to select their politician of choice. Same goes for Bitcoin.

Things have been going well over the past 15 years, so I wouldn't worry about developers getting compromised in the future. If things go south, the community can simply fork away into another chain. That's the beauty of open source and decentralization. Just buy, "hodl", and forget about the rest.