A few questions before starting

I’ve been learning about bitcoin and trying to understand it the past days and I think it’s starting to make sense. Now I have a few questions:

• How often do you watch and buy bitcoin? Are you constantly watching it and buying when it’s low? Are you buying a set amount every x amount of time or does it vary?

• Is there a minimum amount you’d say someone would have to be able to start with or invest each month for it to make sense and if it’s below that better keep it in the bank or do even small amounts make sense?

• Do you keep it all in your wallet or do you transfer some back when it’s at a high?