High edge

How much do you have on your plate? So, for example, daily money or just a bank account? So what you can access quickly/immediately. I'm thinking about when I should start investing my money properly instead of just storing it in the daily money. Edit: First of all, thanks for all the messages. From what I understand, it seems to really depend on what running costs you have per month. Personally, I also lean towards 3k and the rest is invested. But I still have it too