If you are storing bitcoin in your computer for sure you need to have protected computer and have an updated computer and anti-virus but as well you need to have a password on your wallet to make sure that no one will be able to access it or to make transfers but mostly for me I just used the two-factor or the authentication which is pretty good and it really gives a security in your account. You should not tell anyone that you have a bitcoin or that where your bitcoin is stored, for me I never tell anyone except my family but they don't know how it works and where do I store it to make a privacy with my coins.