Personally, I am not too worried about security on my iPhone 6 for a few reasons:
- the iPhone that the FBI was able to access was the iPhone 5C, basically a iPhone 5 in a plastic body which doesn't have the Secure Enclave added to the iPhone 6 and later
- this tool requires direct physical access to the iPhone
- I have the option to use a 4-digit, a 6-digit, or an alphanumeric Passcode which greatly increases the time needed to brute-force the Passcode
- being a boring person in general, I'm more worried about losing my iPhone than some government entity taking an interest in me