Yes, it absolutely is, you should be using a signer to keep your key safe, here are some options: https://nostrapps.com/#signers
SIGNERS. BECAUSE WRITING YOUR SEED ON YOUR MONITOR IS PEAK SECURITY.
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No need to shout - it’s not 1990! ;-p
Nsec security is still not clear to the newbie, especially when every app asks for your nsec and doesn’t suggest a signer.