I've been buying BTC from someone over a longer term (a year or so) as I can afford it, and the other day they said that I have $2,000 in my wallet (which was correct). This shocked me, the only thing I ever gave him was an address to send it to, and he's been using the same one the whole time.
Can he keep seeing my balance?
Can he (or anyone) see when I spend it?
Can he (or anyone) here I spend it, as in who gets it from me...?
And when I'm ready, what can I do so that my balance and habits are no longer able to be tracked by him?
Thanks in advance for your time.