Hello, I hope to have addressed your concerns properly,
Does this tool track my investments from sites like Bittrex, Livecoin, etc
There is an option to add the source where you bought your investment from. This source is set per coin. Afterwards it will group the coins together for your conveniency.
Do I need to access these accounts via your tool to give tool access.
https://cryptotrackr.com does not need access to your account this way, however it requires a bit more of filling in work. Perhaps a future alternative will be added where it can fetch data from your exchange account if desirable.
Is my personal data vulnerable to hack or at risk when I login account
Your account details are encoded using top-grade standards. No sensitive data is kept without encryption and in case of a possible hack, the user will be warned.
Thank you for your reply!