When we put money in a till, it is being put there for safe-keeping and will allow us to quantify how much we have accumulated. Nowadays this accumulation will be deposited with a bank for safe-keeping.
This is where the more practical and psychological meanings coincide. We need to save or conserve what we have – both energy and resources – to get best benefit.
To be withdrawing money from a cashpoint in a dream signifies our need to make use of those resources.